Customer's Voice
Real feedback from our clients and partners
Rikiman Co., Ltd. — 90% Reduction in Shipping Label Creation, Manufacturing DX Frontline
Industry: Manufacturing (Construction Hardware)
Client: Rikiman Co., Ltd.
Situation
Handwritten inspection reports, inability to evaluate vendor quotes, and issues with core system development vendor. The company's 'throw people at every problem' approach had reached its limits.
Request
Adoption of Generative AI Advisor service for operational efficiency and DX promotion
Proposal
- Automated shipping label pipeline (Core system CSV → GAS → Label software)
- Digitization of inspection reports (Google Form → Spreadsheet → Google Docs)
- IT vendor quote scrutiny and correction
- Core system development process improvement guidance
Result
90% reduction in shipping label workload (rolled out to all offices), 50-60% reduction target for inspection reports, discovered and corrected ¥100K markup on outdated PC from vendor, expanded internal AI users to 17+
Customer's Voice
Having someone who understands IT as a supporter for the company — isn't that actually cheap? Without Tominaga, we would have paid vendor quotes without question. AI is like everyone having their own personal secretary — and that's gradually becoming reality.
--- Rikiman Co., Ltd. Tokyo Branch Manager Takeshi Isoda
DynamoDB Design & Backend Development for Job Site
Industry: Freelance Engineer
Client: Private
Situation
Frontend implementation was mostly complete. Backend development was outsourced but incomplete, and implemented in PostgreSQL instead of DynamoDB as specified.
Request
Fix backend code with DynamoDB & enable local env / proper deploy
Proposal
- Create DynamoDB design draft
- Explain and decide whether DynamoDB or current PostgreSQL is appropriate
- Propose whether to rewrite backend code to DynamoDB or make it work with current PostgreSQL
Spoke at 'Setouchi-i-Base' talk event operated by Leach Inc. and Kagawa Prefecture
Industry: Government
Client: Kagawa Prefecture Setouchi-i-Base
Situation
Spoke at the entrepreneur talk event 'Map of Independence/Entrepreneurship in Takamatsu' held at 'Setouchi-i-Base', an open innovation base in Takamatsu City operated by Kagawa Prefecture, on Tuesday, February 27, 2025.
AI Technology Optimization Support for ExaEdge Co. Ltd. - Improving Accuracy of Legal Document Analysis
Industry: Software Development
Client: ExaEdge Co. Ltd.
Situation
Supported optimization of AI technology developed by ExaEdge Co. Ltd. (Ho Chi Minh, Vietnam), improving accuracy of Natural Language Processing (NLP) utilizing OpenAI's ChatGPT technology and optimizing processing speed.
Implementation
- Improve legal document analysis accuracy
- Enhance summarization algorithm
- Significantly improve processing speed
- Contribute to reducing burden of corporate legal work and improving operational efficiency
Result
Achieved 40% reduction in operating costs for the service at ExaEdge
Customer's Voice
With Leach's technical support, our legal AI has evolved dramatically. Especially, achieving both cost reduction and performance improvement through NLP optimization and Firebase serverless operation is a very big achievement. Thanks to this technical support, we are now able to provide rapid and accurate legal AI solutions to more companies.
--- ExaEdge Co. Ltd. CEO Nishikawa
AWS Diagram Transcription Support for Japan Joint Solutions Co., Ltd.
Industry: Software Development
Client: Japan Joint Solutions Co., Ltd.
Situation
The current AWS configuration was complex, and dependencies such as frontend, backend, infrastructure, and external APIs were unclear.
Request
AWS Diagram Transcription Support Service
Proposal
- AWS Diagram Transcription
- Security proposals
- Cost optimization proposals
- Proposals for automation with CI/CD, etc.
Customer's Voice
The initial purpose was to create an AWS diagram, but we gained value beyond that. The proposals for cost reduction and security improvement were particularly beneficial, and we expect improvement in long-term operational efficiency.
--- Japan Joint Solutions Co., Ltd. Executive Officer Munakata
MENTA Reviews
Reviews on "MENTA", a technical mentoring platform
I consulted on a case that other mentors couldn't solve! The guidance led me to solutions from perspectives no one else could provide! I was continuously amazed by the brilliant approaches!! I learned so much, and everything was thoroughly explained. Highly recommended among all mentors!
— S
The results exceeded my expectations. Tominaga-san's technical skills are top-class — I felt there was no error he couldn't resolve. His personality is also wonderful, and I'm very satisfied.
— Yuzushiba
I had environment-specific security errors, but Tominaga-san leveraged his experience at a major corporation to handle them carefully. Not many people can deal with these issues — truly a high-level professional.
— Fujihara
I requested a design review for blockchain development. Beyond design documents, development processes, and technical advice, I received extensive guidance on blockchain-specific issues and implementation methods. Very valuable.
— Mikan
I was struggling with authentication and authorization implementation, and couldn't solve it on my own. The guidance was extremely helpful! I believe he is a very skilled engineer!
— Masa
Despite my sudden request, he kindly took on my consultation. He supported the entire process of deploying to a Sakura server via GitHub with Laravel. As a beginner, I'm grateful for the thorough and detailed guidance.
— otayuria
Thank you for the short but productive time! You answered every question and even helped me create a learning roadmap. Much appreciated.
— aiueo5000
I consulted about infrastructure and cloud architecture. The responses were extremely thorough and very helpful.
— hikaru.coupe
Thank you for all the incredibly helpful advice!! The product direction changed significantly, so I'll pause for now, but I'll reach out again when I need help!!
— schwarzwald
I had a casual consultation about work-related topics. Mainly discussed API design, and toward the end, even got career advice. The API guidance was spot-on, and the life advice was encouraging. I'd like to contract again.
— Yoshida
He was very attentive in listening to my concerns. I was lost about direction, but now I know what I should do. Looking forward to continued support.
— Blago188
Received very thorough and accurate guidance on Docker environment setup.
— Ryo Ishii
He was very supportive and resolved my issues with reliable skills. Thank you so much!
— sorasuke
Quick response, very helpful. I'll consult again for AWS-related issues.
— Macaroni
Quick communication and careful support — very helpful. I'll reach out again if anything comes up.
— DFRD
Fast responses, and he shows me what I want to know and provides clear direction. Very easy to work with.
— P-2
Received very thorough and kind support! I may consult again in the future — please take care of me then!
— Shijo
The guidance was easy to understand and thorough — very helpful. Thank you. Looking forward to working together again.
— marina00
A very knowledgeable person — I learned a lot.
— Dachiko
Answered my questions very thoroughly and kindly. Thank you.
— Maruyama
The answers to my questions were extremely thorough and educational.
— Shuichi TANAKA
Clear explanations — very helpful. I'll be back when things settle down.
— Koji1210
I'd be happy to consult again if anything comes up. Thank you!
— otayuria
Thorough support — I'm very grateful.
— Miki
Very helpful. Thank you.
— Taka0130
I'd like to re-contract in a few months. Thank you.
— minhouse10
Thank you.
— Nieda Yoshiaki
I may need your help again — thank you for everything.
— Nifudo
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