Leach Inc. (Location: Minato-ku, Tokyo; CEO: Takuya Tominaga; hereafter Leach) announces that Representative Takuya Tominaga served as a lecturer at the Japan Society for Software Science and Technology (JSSST) 42nd Conference Tutorial.
Theme: "〖Generative AI Agent〗 Let's build a 'Chat with PDF Service' using Next.js x Mastra x Convex x Stripe"
He explained how to release a Generative AI agent Web service at explosive speed, covering transcription from PDF to Markdown / chunk division of Markdown / generation of embedding vectors / RAG / agent design / token-linked billing / immediate publication by CI/CD.
Please refer to the conference official site for event details.
Conference Official: JSSST 42nd Conference Tutorial
Date: Tuesday, September 2, 2025, 13:00–16:00 / Venue: Face-to-face (No online)
■ About Past Lectures
42nd Conference "【Generative AI Agent】 Let's build a 'Chat with PDF Service' using Next.js x Mastra x Convex x Stripe" Lecturer: Takuya Tominaga (Leach Inc.)
41st Conference "Smartphone as a Sensor: Introduction to Mobile Sensing" Lecturer: Yuki Nishiyama (The University of Tokyo)
40th Conference "Try, Make, and Know: Introduction to Live Programming" Lecturers: Jun Kato (AIST), Baku Hashimoto (AIST)
... (Past conferences omitted for brevity)
■ Background of the Tutorial
Students are research professionals, but they haven't learned the methods to "release products at the fastest speed" using their research results. Therefore, we shared a methodology to run through design -> implementation -> publication in one go, utilizing AI agent frameworks like Mastra, without sticking to scratch implementation.
Put the knowledge cultivated in research out into the world as a moving product. Through that experience, increase the number of products that change the world with "Generative AI Agent services" from Japan — that is the intention behind this lecture.
■ Main Content Covered in the Session
■ Why we challenge the Generative AI x SME domain
└ Introduction of our own SaaS that automates document work "grinding" in the field using Generative AI agents.
■ Overview of the service that can chat with PDF
└ Overall Architecture (UI / Agent / RAG / Billing / CI/CD)
■ Introduction to Mastra
└ Introduction to Mastra's function list, basics of tool/memory/flow design and implementation points
■ Introduction to Convex & Stripe
└ Function introduction of Convex/Stripe, creation of billing plans based on token count
■ Design and Implementation of Chat with PDF Service
└ Convex DB design, Connecting Next.js with AI Agent/Clerk/Convex, Token-linked usage billing
■ Deployment of Chat with PDF Service
└ Deployment using Mastra Cloud, Vercel
■ Future Aspirations / Message
We hope to increase the number of developers who release Generative AI agents from Japan.
To that end, we will implement such education and transmit the method to develop and release AI agents at explosive speed. Producing world-class products from Japanese fields — the first step is not to develop from scratch, but to use existing convenient frameworks and release today.
■ About Japan Society for Software Science and Technology
Name: Japan Society for Software Science and Technology (JSSST)
Location (Secretariat): 3F, 5-3-13 Otsuka, Bunkyo-ku, Tokyo 112-0012 (Inside Institute for Academic Support)
Representative: President Naoki Kobayashi
Establishment: October 8, 1983 (Incorporated May 11, 2011)
Official Site: https://www.jssst.or.jp/
Business Content: Activities contributing to the development of research and academic culture in the computer software field (Holding academic meetings, publishing journals/books, etc.)
■ About Leach Inc.
Company Name: Leach Inc.
Location: 9F Satsunotsuji Square, 5-36-4 Shiba, Minato-ku, Tokyo 108-0014
Representative: CEO Takuya Tominaga
Establishment: November 13, 2024
Corporate Website: https://leach.co.jp
Business Content: Generative AI Pre-processing BPO / Provision of Document Work Specialized AI Agents
Representative's Background: Takuya Tominaga is an engineer who formerly worked at "Toshiba Software Engineering Center" and "Toshiba Tec Corporation Corporate Strategy Office," in charge of HDD firmware development, cloud infrastructure design, and data analysis environment construction, continuously pursuing the essence of technology. The background of obtaining all 12 AWS certifications in just one month lies in his challenger spirit that does not flinch at difficult challenges. With the mission to "Regain Japan as No.1," he is focusing on creating a virtuous cycle where SMEs overwhelmingly improve efficiency by deeply penetrating Generative AI -> invest surplus time in R&D -> the possibility of innovative technologies being born increases throughout Japan.
※ Career: Kumamoto NIT Yatsushiro Campus -> NAIST Master's Course Completion -> Toshiba Corp. -> Leach Inc. CEO
■ Services Provided by Leach
□ 1) BPO for "Pre-processing Only" of Generative AI
Generative AI is determined by pre-processing.
In Generative AI product development, data preparation is necessary first. We provide pre-processing specialized BPO such as file structuring / automatic division / embedding generation / meta tagging / anonymization. We develop code to arrange data into a "form easy for AI to eat."
□ 2) Own Service: Document Work Specialized AI Agent (Finish by "Conversing" with PDF)
ChatInDoc (Tentative) is a SaaS that automates division/extraction/search/summary/transcription just by throwing in PDFs/images, and completes administrative work such as quotations/invoices/approvals via chat.
You will be freed from the work of transcribing purchase order/invoice PDFs and converting them to CSV.
■ Contact
If you have any problems regarding Generative AI, such as "want to request only pre-processing" or "want to try document SaaS," please feel free to contact us.
Consultation/Quote: https://leach.co.jp/en/contact