Kohei Hishiyama - Technical Portfolio

Senior Full-Stack Developer & AI Co-Creation Specialist

Chapter 1: Why Choose Kohei Hishiyama

18 Years of Proven Track Record & Reliability - Supporting success for enterprises and SMEs since THINK DESIGN establishment in 2006

Cost-Efficient High Quality - Delivering equal or superior quality at 50-70% of major agency costs

Rapid Response Capability - Flexible handling of urgent projects through individual business agile decision making

Technical Superiority - Cutting-edge technology implementation leveraging AI co-creation development and proprietary SaaS product experience

Long-term Partnership - Focus on building continuous relationships rather than one-off projects

Performance Highlights - Why Kohei Hishiyama is Chosen

▶ Cost Reduction Results

▶ Speed Response Capability

▶ Results-Focused Performance

Chapter 2: Recent Project Portfolio

▶ Operational SaaS Product: HUNT MASTER

GPS Hunting Log SaaS for Field Operations (Browser-based, PWA-oriented)

HUNT MASTER Product Screenshot

↑ HUNT MASTER - GPS Hunting Record App (Offline-First / PWA)

Value Proposition

Technical Features

Development Background

Traditional paper-based methods and many existing apps are not designed for long-term use in offline environments, often failing during field operations. HUNT MASTER prioritizes "Offline-First" functionality, ensuring reliability through map tile pre-caching, IndexedDB storage, and a background-sync approach for photo uploads — all while delivering the browser-based accessibility and cross-platform convenience that native apps cannot match.

Key Features and Technologies Used

Key Differentiators

Customer Success & Hospitality Approach

HUNT MASTER is engineered to maximize efficiency and reliability in the field. It features an intuitive interface for first-time users, large buttons for gloved operation, and a "one-tap" workflow for instant record completion. Visual map markers and track display make it easy to review hunting ground at a glance. Beyond being a simple recording tool, it acts as a long-term partner committed to supporting user activities in the field.


Status : Released - Product Page


▶ Operational SaaS Product: LOCATION MASTER

GPS Location Recording & Management System for Route Delivery Businesses

LOCATION MASTER Product Screenshot

↑ LOCATION MASTER - GPS Stop Location Management System

Value Proposition

Technical Features

Development Background

LOCATION MASTER was developed to address challenges in new route development for route delivery businesses. Traditional methods using paper maps and notes suffered from lack of accuracy and difficulty in information sharing. By leveraging smartphone GPS functionality, we built a system that records and visualizes accurate location information with a single tap. Server-side storage enables information sharing across multiple devices, significantly improving route management operations for businesses.

Key Features and Technologies Used

Pricing

Key Differentiators

Customer Success & Hospitality Approach

LOCATION MASTER adopts a service design that prioritizes operational efficiency for route delivery businesses. We provide an intuitive interface that even first-time GPS app users can navigate without confusion, one-tap recording operations, and visually clear route displays. We balance simplicity and functionality so all users can achieve efficient location management. We commit to being not just a recording tool, but a partner supporting business expansion.


Status : Operational - Product Page


▶ Operational SaaS Product: SALES MIA

Next-generation AI assistant revolutionizing sales activities

SALES MIA Product Screenshot

↑ SALES MIA - Sales-specialized AI Assistant Platform

Value Proposition

Technical Features

Development Background

The development of SALES MIA was inspired by the challenge of balancing efficiency and personalization in sales activities. Traditional sales email tools suffered from template uniformity and cost/security issues due to external AI service dependencies. We built a low-cost yet high-functionality sales email automation platform from scratch, achieving fully proprietary AI engine with local processing, complete multi-tenant isolation, and full legal compliance.

Key Features and Technologies Used

Plans & Pricing

Key Differentiators

Customer Success & Hospitality Approach

SALES MIA adopts a service design that prioritizes sales representative success above all. We provide intuitive interfaces that even beginners can use without confusion, detailed operation guides, and support systems specialized for sales activities. We implement comprehensive support so all users can achieve efficient sales email delivery. We have a commitment as a partner to maximize sales activity results, not just tool provision.


Status : Operational - Product Page


▶ Development Project: BY MYSIDE

Next-generation AI assistant development project targeting busy daily life support

BY MYSIDE Development Screenshot

↑ BY MYSIDE Development Interface - AI Assistant Platform

Value Proposition

Technical Innovation

Development Background

This project began with the desire to support users who want to efficiently utilize digital tools in their busy daily lives. In particular, the effort of switching between many apps to check and operate information has become a significant burden. Therefore, we arrived at the concept of the AI assistant "KEIKO (name of prototype)" that can complete daily tasks (schedule management, email checking, route searching, etc.) through natural dialogue and simple talent key operations, just like asking a secretary.

Design Philosophy and Basic Principles

We prioritize user experience and proceed with development based on the following design principles.

Key Features and Technologies Used

Monetization Strategy and Future Prospects

Customer Success & Hospitality Approach

Project BY MYSIDE is deliberately designed as a local-centric AI service, enabling deeper AI operations that are only possible through this approach. With the mission of eliminating the digital divide while maximizing respect for user privacy, all confidential information processing is completed in the user's local environment. Online management handles only service usage rights and feature activation. Through three core authentication systems - Agent License Token, Talent Key Definition Files, and Hybrid Orchestration - we realize the innovative architecture of "AI brain locally, keys in the cloud." This hybrid approach provides users with peace of mind while building a sustainable business model as SaaS.


Status : On-premise version completed


▶ Development Project: SCAN ROUTE

Next-generation efficiency system for delivery industry optimization

SCAN ROUTE Development Screenshot

↑ SCAN ROUTE Development Interface - Delivery Optimization System

Value Proposition

Technical Innovation

Development Background

The development of SCAN ROUTE was inspired by the delivery industry's labor shortage and business efficiency needs. Through detailed interviews with industry stakeholders, we discovered fundamental challenges that existing solutions couldn't address. We confirmed the necessity for an integrated system that comprehensively supports overall delivery operations and developed and implemented unique technologies and algorithms. The core technology of this project is patent-pending, and detailed technical information disclosure is restricted from an intellectual property protection perspective.

Key Features and Technologies Used

Sales & Distribution Mechanism

SCAN ROUTE is planned to be provided as a subscription-based SaaS (Software as a Service) product. We're preparing a pricing structure that responds to diverse needs from individual plans for freelance light cargo drivers to enterprise plans for transportation companies. Through the official website (in development), we'll handle the complete sales process including demo experiences, plan selection, and secure payment processes. We'll provide long-term support for customers' delivery operations through continuous updates and support.

Intellectual Property Rights and Technology Protection

Regarding SCAN ROUTE's core technology - the delivery efficiency algorithm - patent application procedures are currently underway for intellectual property protection purposes. Therefore, information disclosure about the algorithm's specific mechanisms, data processing methods, and system design details is restricted until patent publication. This technology protection approach maintains competitive advantage while securing future licensing opportunities and technology partnership possibilities.

Customer Success & Hospitality Approach

SCAN ROUTE adopts a service design that prioritizes delivery driver success above all. We provide intuitive interfaces that even novice drivers can use without confusion, detailed operation guides, and support systems specialized for delivery operations. We implement comprehensive support so all users can achieve efficient delivery operations. We have a commitment as a partner to realize delivery driver work style reform and income improvement, not just tool provision.


Status : In Development


▶ Internal System: DEVILLE COLLECTOR

Next-generation information asset platform for strategic business intelligence

DEVILLE COLLECTOR System Interface

↑ DEVILLE COLLECTOR - Detailed technical information disclosure is restricted

Value Proposition

Technical Innovation

Development Background

The development of DEVILLE COLLECTOR was inspired by the need for rapid and accurate data-driven decision making in modern business. Through internal business challenge analysis, we discovered fundamental issues that existing general-purpose tools couldn't address. Convinced of the necessity for an integrated system that comprehensively supports information collection and analysis processes, we developed and implemented proprietary technologies. The core technology of this project has high confidentiality from a business strategy perspective, and detailed technical information disclosure is restricted.

Key Features and Technologies Used

Sales & Distribution Mechanism

DEVILLE COLLECTOR is a private system operated on dedicated VPS (Virtual Private Server). Sales or distribution as a general SaaS product is not intended. Access is strictly restricted to authorized internal users, ensuring a secure and closed operating environment.

Intellectual Property Rights and Technology Protection

DEVILLE COLLECTOR's core technology - the information collection and analysis engine - is strictly managed as corporate trade secrets. To protect proprietary methods and maintain competitive advantage in internal operations, detailed disclosure of algorithms and system design is firmly restricted. This approach ensures the long-term strategic value of the system.

User-Centered Design Philosophy

DEVILLE COLLECTOR adopts a service design that prioritizes operator efficiency above all. We provide intuitive interfaces that even beginners can use without confusion, detailed operation logs, and support systems specialized for data management operations. We implement comprehensive support so all authorized users can achieve efficient information asset construction. We have a commitment as a partner to maximize information value, not just tool provision.


Status : Completed & Private


▶ In-house SaaS Product Development: ANTI SWIPER RUBIK

Proof of product development capability generating continuous revenue while maintaining operational costs at near-zero levels Pt.2(approximately ¥10,000 annually)

ANTI SWIPER RUBIK Demo Screenshot

↑ ANTI SWIPER RUBIK Official Website - Complete SaaS Platform

Value Proposition

Technical Advantages

Development Background

The development of ANTI SWIPER RUBIK began with a fundamental reconsideration of traditional one-dimensional slider concepts. Through actual operational experience in digital signage and exhibition venues, I confirmed strong demand for grid-based carousels that could deploy content omnidirectionally. To achieve both "true multi-directional infinite loops" and "intuitive navigation experiences" that existing libraries found difficult to realize, I developed a unique algorithm inspired by the Rubik's Cube through AI-assisted design and implemented it from scratch.

Key Features & Technologies

Status : Operational - Product Page


▶ Operational SaaS Product: ANTI SWIPER

Proof of product development capability generating continuous revenue while maintaining operational costs at near-zero levels (approximately ¥10,000 annually)

ANTI SWIPER Official Site

↑ ANTI SWIPER Official Website - Complete SaaS Platform

Value Proposition

Business Results

Development Background

The initial concept for ANTI SWIPER arose from encountering limitations of existing slider libraries in my own web development projects. I needed a slider that could provide seamless infinite loops without visual glitches, operate smoothly on all devices, and efficiently handle diverse content types. Unable to find a solution meeting my stringent requirements, I decided to build my own from scratch using AI co-creation development methods.

Key Features & Technologies

Sales & Distribution Mechanism

ANTI SWIPER is offered as a subscription-based SaaS (Software as a Service) product. I handle the entire sales process through my official website (anti-swiper.com), which includes detailed product information, demos, pricing plans, and a secure checkout process powered by Stripe.

Customer Success & Hospitality Approach

As part of the ANTI SWIPER family products, I prioritize subscriber success above all else. My hospitality-focused service approach ensures that every subscriber can utilize my products to their full 100% potential.

Status : Operational - Product Page


▶ Multilingual Corporate Website: THINK DESIGN

Showcase of Technical Capabilities

THINK DESIGN Corporate Website

↑ THINK DESIGN Corporate Website - Complete Japanese/English Support

Value Proposition

Technical Features

Development Approach

I approached my own website the same way I approach other client projects: starting with thorough target audience research, defining clear objectives, and implementing a design system that could scale across multiple languages and device types. This site functions as both my business platform and a live demonstration of my latest technology capabilities through AI-assisted efficient development processes.

Key Features & Technologies

Design Philosophy

The THINK DESIGN website embodies my core design principles: clarity, functionality, and elegance. Every element serves a purpose, from typography choices that ensure readability across languages to navigation structures that intuitively guide users through my services and portfolio.

Status : Operational - Corporate Site


▶ Corporate Website Development: THINK DESIGN1st generation

▲ Website Japanese Screenshot (Placeholder)

▲ Website English Screenshot (Placeholder)

▲ Website Hindee Screenshot (Placeholder)

▲ Website Thai Screenshot (Placeholder)

▶ Project Overview:

This site was the original corporate website created at the founding of THINK DESIGN—a milestone project that pioneered our technical and creative direction. Built as a Single Page Application (SPA), it featured seamless navigation and dynamic content switching, with full support for four languages (Japanese, English, Hindeese, Thai) via JSON-based management. This approach enabled a global-ready, highly interactive user experience far beyond traditional static sites.

The most distinctive feature was its custom menu-linked slider UI, which directly inspired the later development of our flagship SaaS product, ANTI SWIPER. Unlike ordinary carousels, this slider offered a unique, interactive navigation experience tightly integrated with the site's structure. Despite being a SPA, all routing, animation, multilingual switching, and content management were handled entirely on the frontend, resulting in a lightweight yet powerful solution.

▶ Development Approach:

The site also set a high bar for design, animation, accessibility, and performance optimization—demonstrating technical excellence that stood out among corporate sites of its era. Although it was retired to align with the new branding introduced alongside ANTI SWIPER, this project remains a symbol of THINK DESIGN's spirit of innovation and technical ambition, and marks the origin of our next-generation product line.

▶ Key Features & Technologies Used:

▶ Legacy & Impact:

This project represents the foundation of THINK DESIGN's technical excellence and innovation spirit. The custom slider technology developed for this site became the cornerstone of our flagship SaaS product ANTI SWIPER, demonstrating how internal projects can evolve into successful commercial products. Although retired, this site remains a testament to our commitment to pushing the boundaries of web technology and user experience design.

The site was ultimately retired to align branding with the launch of ANTI SWIPER and transition to our current corporate identity. However, the production concept and technical implementation were exceptional, featuring an overwhelming level of sophistication despite its SPA architecture. The underlying mechanisms and technical approach represented a level of innovation that was truly ahead of its time.

Status : Archive - Go Archive Site


Chapter 3: Industry Portfolio - Versatile Cross-Industry Capabilities

※ Due to non-disclosure agreements, many achievements cannot be made public. Here are select examples from various industries.

▶ Food & Beverage

Selection Advantage: Specialized in mobile-era campaign systems and interactive promotional events

Featured Project: Pepperidge Farm Off-Style Campaign

During the feature phone era, I developed a lightweight device-based serial lottery event system. Campaign stickers with embedded serial numbers were attached to Pepperidge Farm products, enabling instant on-site lottery draws. Winners received original tote bags (shipped later), while non-winners got original wallpapers compatible with various device models.

Following Campbell Japan's brief, I handled the entire project from campaign format and design to lottery system mechanics and campaign execution. I conducted testing across dozens of feature phone models using rental booths. This successful first campaign led to it becoming a regular promotional format for the company due to positive response and sales results.

Key Projects: Pepperidge Farm Off-Style Campaign (Serial Lottery System), Omori Foods Co., Ltd. Corporate Website, Indian Restaurant Rajan Website / SNS Support

Clients: Meijiya, Campbell Japan, Shimokitazawa IRIE DINING BAR "TRIP", Omori Foods Co., Ltd., Indian Restaurant Rajan

▶ Publishing / Books / Media

Selection Advantage: Expertise in editorial and publishing industry-specific workflows

Key Projects: Miraisha Official Corporate Site, 'From Today, Hitman' Movie Special Page, Bunka Publishing Three-Part Project (MT Multi Blog)

Clients: Nihon Bungeisha, Bunka Publishing, Kenpakusha, Miraisha, Manga Grimm, Honwara, Jingi-naki Drama, S*Girl, Asakura Shoten

▶ Real Estate / Automotive

Selection Advantage: UI/UX design specialized for high-value product sales

Key Projects: Audi Yokohama Aoba Web Update Structure, Verena Series Promotion Page, Renos Funabashi Promotion Special Page

Clients: Audi Yokohama Aoba, Audi Japan, Nihon Sogo Jisho (Daiwa Jisho Residence), Act Cube Co., Azel Co.

▶ E-commerce / Fashion / Brands

Selection Advantage: Sales-direct EC optimization expertise

Key Projects: Space Shower Store EC Site, Oshman's Online EC Site, Wagokoro Co., Ltd. Brand Site Renewal

Clients: Space Shower Store, Oshman's Online, Wagokoro Co., Ltd.

▶ Medical / Dental

Pursued web design balancing trust and approachability for medical institutions, including smartphone support and reassuring site navigation.

Key Projects: Odaiba Yamamoto Dental Clinic, Hamizukai Website

Clients: Odaiba Yamamoto Dental Clinic, Hamizukai

▶ Corporate / Business

Designed and developed corporate sites and business support pages, achieving enhanced corporate image and effective information visualization.

Key Projects: Daiyoshi Co., Ltd. Corporate Website, Japan Resource Co., Ltd. Website

Clients: Daiyoshi Co., Ltd., Japan Resource Co., Ltd.

▶ Promotion / Campaign / LP

Produced high-impact landing pages and campaign sites quickly and with high quality, supporting Flash effects and special configurations.

Key Projects: ELK Fukuoka.com Campaign Site, Shibuya Fashion Festival Vol.03 Special Site, Takarazuka Certification Campaign Page

Clients: ELK Fukuoka.com, Tuning Shop RACE WARS, Shibuya Fashion Festival Vol.03, Takarazuka Certification Campaign

▶ Product / Goods Production & Promotion

Handle production of original goods and promotional items like smartphone cases and uniforms, tailored to brand image and target audience.

Key Projects: LOOOP Co., Ltd. Smartphone Case Design, Ventforet Kofu (J-League) Smartphone Case Design, Penalty社カスタム Brand Uniform Design, Mizuno Brand Uniform Design

Clients: LOOOP Co., Ltd., KFC, Ventforet Kofu (J-League), Penalty社カスタム, Mizuno

▶ Training / Education

Provided in-house education at web agencies and instruction at design schools, teaching HTML/CSS basics, wireframing, and UI design.

Key Projects: In-house education at web agencies (HTML/CSS basics, wireframing), Public vocational training school Web design training course instructor

Clients: Media Mart Co., Ltd., Nationally Commissioned Training Projects

Chapter 4: Competitive Advantages & Differentiation

▶ Cost Competitiveness

Item Major Agencies Kohei Hishiyama Reduction Rate
Basic Production Cost ¥2-5M ¥1-3M 40-50% Reduction
Monthly Maintenance ¥100-300K ¥50-150K 50% Reduction
Additional Modifications ¥50-100K/time ¥20-50K/time 60% Reduction

▶ Response Speed

▶ Technical Advantages

▶ Partnership Value

Chapter 5: AI Co-Creation Development Approach

▶ Next-Generation Development Methods

Revolutionary development process with AI technology as partners

Differentiation from Traditional Development

Chapter 6: Business Partnership Proposal

▶ Immediate Value Proposition

Contact & Consultation

Why not start with a free consultation?


Email: hello@thinkdsgn.com

Phone: +81 80 2780 7686


Kohei Hishiyama - Delivering Technical Excellence Through AI-Enhanced Development

This portfolio demonstrates capability through actual operating products and measurable results. References and detailed technical discussions available upon request.