Senior Full-Stack Developer & AI Co-Creation Specialist
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
GPS Hunting Log SaaS for Field Operations (Browser-based, PWA-oriented)
↑ HUNT MASTER - GPS Hunting Record App (Offline-First / PWA)
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.
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
GPS Location Recording & Management System for Route Delivery Businesses
↑ LOCATION MASTER - GPS Stop Location Management System
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.
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
Next-generation AI assistant revolutionizing sales activities
↑ SALES MIA - Sales-specialized AI Assistant Platform
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.
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
Next-generation AI assistant development project targeting busy daily life support
↑ BY MYSIDE Development Interface - AI Assistant Platform
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.
We prioritize user experience and proceed with development based on the following design principles.
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
Next-generation efficiency system for delivery industry optimization
↑ SCAN ROUTE Development Interface - Delivery Optimization System
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.
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.
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.
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
Next-generation information asset platform for strategic business intelligence
↑ DEVILLE COLLECTOR - Detailed technical information disclosure is restricted
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.
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.
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.
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
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 Official Website - Complete SaaS Platform
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.
Status : Operational - Product Page
Proof of product development capability generating continuous revenue while maintaining operational costs at near-zero levels (approximately ¥10,000 annually)
↑ ANTI SWIPER Official Website - Complete SaaS Platform
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.
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.
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
Showcase of Technical Capabilities
↑ THINK DESIGN Corporate Website - Complete Japanese/English Support
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.
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
▲ Website Japanese Screenshot (Placeholder)
▲ Website English Screenshot (Placeholder)
▲ Website Hindee Screenshot (Placeholder)
▲ Website Thai Screenshot (Placeholder)
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.
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.
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
※ Due to non-disclosure agreements, many achievements cannot be made public. Here are select examples from various industries.
Selection Advantage: Specialized in mobile-era campaign systems and interactive promotional events
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
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
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.
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.
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
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.
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
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
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
| 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 |
Revolutionary development process with AI technology as partners
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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.