Practical AI adoption.
We stay until the results are in.

We do not stop at launch. We work alongside your team through measurement, until the results show up in the numbers.

Our Principles

We promise results, not just a launch.

AI becomes valuable not on the day it is installed, but on the day its results show up in the numbers. Over 12 years on a manufacturing floor, we have seen well-built systems sit unused because they never fit the people doing the work. So whatever the service, REIZI PRODUCTION does not stop at launch. We stay through measurement until the results are confirmed.

Measure, then speak

We confirm impact with before-and-after or same-period measurements and always state the comparison conditions. Estimates are never mixed with actual results.

Keep decisions with people

AI handles intake, organizing, and drafting. Final calls such as prices and approvals stay with a human by design.

Start small, keep going

We begin with the smallest setup that works within a week and grow it based on how the team actually responds. Features nobody uses are not added.

About the representative

Services

AI Strategy Consulting

We analyze your business challenges and formulate optimal AI adoption strategies to maximize ROI.

Practical AI Training

Hands-on AI training directly applicable to your work. Participants gain skills they can use the very next day.

Custom AI Automation

We develop AI automation systems optimized for your workflow, dramatically improving productivity.

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By Industry

Reuse and Buyback

This is the industry we are deepest in. We call our AI for buyback stores the KaitoriAI series. From the first appraisal inquiry to posting what was bought, it takes over the steps that used to keep staff tied up, one at a time.

KaitoriAI series

From intake to listing, the design is the same: AI handles the first response, people keep the judgement. You can start with a single product.

KaitoriAI Chat
First response to appraisal requests on LINE
Case study available
KaitoriAI Call
First response to phone calls
Demo available, starts as a pilot
KaitoriAI Post
Automated posting of buyback results
Adoption decided, results once it is live
Listing automation
Built around how each client keeps its data
Starts from a requirements interview

See the KaitoriAI series Visit the KaitoriAI Chat site

Case Study

KaitoriAI Chat in production

Kouka Kaitori Takagai (Futatabi Inc.)

An AI intake bot on the client's official LINE account collects the details needed for an appraisal and hands staff a ready-to-act request. In production since July 2026.

About 2x

Gross profit per inquiry

Same-period A/B test vs. the previous web form (2026-07-13 to 07-31)

1 in 2

Inquiries ready for immediate action (was 1 in 3)

Measured in the same A/B test

About JPY 120k / month

Labor cost reduction

Before/after operations comparison (not from the A/B test)

See case studies

Representative

Reiji Kobayashi

Representative, REIZI PRODUCTION / Engineer at a major manufacturer (M.Eng.)

I am Reiji Kobayashi, representative of REIZI PRODUCTION. For more than 12 years I have worked as an engineer at a major manufacturer, solving problems on the shop floor with technology.

What REIZI PRODUCTION promises is results, not a launch. We work alongside your team through measurement, until the numbers confirm it. Please feel free to get in touch.

About the representative