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タダつく is a hands-on AI consulting and custom tool development service offered by Sadame Inc. in Kumamoto, Japan. It is positioned between general-purpose SaaS and traditional SI development. The service starts with a 60-minute session to understand the client’s business workflow, identifies one highly repetitive function that can be delivered within 4 weeks, and then provides a working prototype. Publicly listed examples include insurance PDF parsing, real estate contract drafting, voice records for elderly care, accounting journal entries, restaurant purchasing forecasts, and online education platforms. On the technical side, it mentions GPT-4o, Claude, OpenAI/Anthropic business APIs, as well as integrations with React, Supabase, Cloudflare, freee/Money Forward, LINE, and Stripe.
The standard price is 100,000 JPY per month before tax. This includes one monthly interview/deliverable review, chat-based operational support, and one additional feature per month. The initial 60-minute diagnostic session is free, and there is no charge for the first month. Clients can stop after reviewing the specification document in Week 2, or decline to continue after the Week 4 trial, without being charged. After 2 months, the service can be canceled monthly with no penalty. Payment is settled at the end of the month and made by bank transfer at the end of the following month. External API fees, potentially around 1,000 JPY, may be billed at cost.
Its strengths are low experimentation cost, a clear process, and the discipline of “building one usable function first,” making it suitable for small and mid-sized businesses that want to validate AI automation. Its privacy terms are also relatively specific: an NDA can be signed in advance, each client gets a dedicated development environment, business APIs are not used for training, and source code, prompts, and training data are deleted within 30 days of cancellation with a written report provided. The main limitation is that the 100,000 JPY monthly scope generally covers only one feature per month, while complex or parallel requirements require a separate quote. It is also not a self-service SaaS product, so delivery quality depends on the consultant and development execution. In professional areas such as legal, tax, healthcare, and insurance, AI outputs still require final review by a human or qualified professional.
It is best suited to local Japanese SMEs, professional service firms, BPO providers, industry associations, and partners with existing customers—especially teams that still rely heavily on paper, Excel, PDFs, LINE, and manual data entry. The website does not indicate Chinese-language support, and the service appears to be primarily in Japanese. Access from mainland China, cross-border payment, and contract applicability are not disclosed and need to be confirmed directly. Alternatives may include kintone, Salesforce, Zapier/Make, local SI providers, or building lightweight tools in-house with ChatGPT/Claude/Cursor.
⚠ This review is compiled from public sources and does not constitute a purchase recommendation. Verify all facts on the vendor's official site. Verify on tadatsuku.com official site.
tadatsuku.com is an Japan AI Apps provider. TG4G tracks its product information, with monthly pricing from $640.00, an overall rating of 6.0/10, and a China-accessibility score of Limited (proxy recommended). Click "Visit Official Site" to reach tadatsuku.com directly.