An AI advisor that pays for itself.
Your "gatekeeper" against vendor overcharges and bad AI investments. Example: ¥1.7M quote → ¥1M. From ¥50,000/month.
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The advisory fee pays back many times over
¥50K/month investment → tens to hundreds of thousands in savings.
Example: ¥1.7M quote → ¥1M
We sit in on vendor meetings, spot unnecessary features and inflated estimates. We know tech — so we know what to cut. ¥700K saved = 14 months of Light plan fees.
"That can be done with AI" — one sentence saves millions
Manual tasks hiding in your workflows can often be automated with AI. We find them and propose solutions. The labor cost savings are enormous.
Stop bad AI investments before they happen
"Let's adopt ChatGPT because it's trending" — but is it right for your problem? An expert on the front lines prevents wasteful spending.
Ask on Slack, get instant answers
"Can AI do this?" "Is this quote fair?" — ask on Slack, get immediate answers. No more wasting time and effort researching on your own.
9 years at Toshiba + 40+ companies advised
An engineer with 9 years at a major corporation provides direct support. Understands both enterprise complexity and startup speed — so advice is always practical.
For ¥50K/month, prevent millions in wasted vendor spending.
Advisory Cost vs. Savings
A ¥50K/month investment delivers outsized returns.
Annual Cost Comparison
Up to 96% cost reduction vs. hiring
Vendor Quote Compression
Before
¥1.7M
After
¥1.0M
¥700K saved
Legal AI Operating Cost
Before
100%
After
60%
40% reduction
Hiring AI Talent vs. Advisor
Before
¥12M/year
After
¥600K/year
¥11.4M/year saved
One vendor quote review pays for 14 months of the Light plan.
Numbers that speak
What does a generative AI advisor do?
Think of it as a "tech lawyer" — but for AI and IT decisions.
Just ask on Slack. AI questions, system issues, vendor negotiations — we handle it all.
Vendor Gatekeeper
Quote reviews, tech selection, requirements validation. We make sure you're not being overcharged
AI Help Desk
"Can AI do this task?" — instant answers with implementation plans included
Development Direction, Clarified
Prototype direction proposals, PoC design oversight — because we understand the tech, we guide the right decisions
3 signs you need a generative AI advisor
If even one applies, a generative AI advisor saves you money.
Can't tell if vendor quotes are fair or inflated
"AI system development: ¥5M" — is that reasonable? Without tech expertise in-house, you're paying whatever they ask.
Want AI but don't know where to start
ChatGPT? Claude? Custom build? SaaS? Too many options. Before spending money in the wrong direction, it's faster and cheaper to ask an expert.
Want to hire AI talent but can't find or afford them
AI engineer salaries: ¥8-15M/year. An advisor at ¥50K/month = ¥600K/year. Less than one-twentieth the cost of hiring.
Case Study
Real results from real clients.
Challenge
Legal AI had low accuracy and slow processing. No AI talent in-house to fix it.
Solution
AI accuracy tuning + server architecture optimization — improved both performance and speed.
Result
40% reduction in operating costs
With Leach's technical support, our legal AI evolved dramatically. Achieving both cost reduction and performance improvement was a significant achievement.
— ExaEdge Co. Ltd. CEO Nishikawa
Trusted By
Companies using our generative AI advisory service.
Who is your advisor?
Not a consultant who just hands you a report. This person works with you directly.
Takuya Tominaga
CEO, Leach, Inc.
Spent 9 years at Toshiba Software Technology Center, working alongside Google and McKinsey on cutting-edge data projects. Achieved all 12 AWS certifications in approximately one month (first in Toshiba Corporation). After visiting workplaces across Japan and witnessing staff using rulers on monitors to reconcile documents, founded Leach in 2024.
Toshiba R&D
9 years. Joint projects with Google & McKinsey. Youngest to be assigned to subsidiary executive office
AWS All 12 Certs
Achieved all 12 certifications in ~1 month. First in Toshiba Corporation
YC Hackathon
Won Technical Award at YCombinator's 'c0mpiled'. 200+ participants from around the world
Founded Leach
November 2024. Generative AI-focused startup. 40+ companies supported
How we're different from other AI advisory services
We don't just give advice — we understand the tech behind it.
We build our own AI products
We develop and operate Totsugo and Saturn ourselves. Not theoretical advice — real-world experience from someone who builds and sells AI products.
Not just AI — we understand everything
Websites, servers, databases, security. Because we see the whole system, we make better decisions.
Advisory fees are an investment with proven ROI
Vendor quote compression, labor savings from automation. We're obsessed with delivering multiples of the advisory fee in value.
3 simple steps
30-minute free consultation → start immediately.
30-minute free consultation
Tell us your challenges. We'll explain how an advisor can help.
1-month trial
Start with 1 month to check the fit. If it's not right, no obligation to continue.
Slack — instant start
Invite us to your Slack and ask anything from day one.
AI Advisor Pricing Plans
From ¥50K/month. Dramatically cheaper than hiring AI talent.
Start with 1-month trial → confirm fit → annual contract. Prices will increase — lock in now.
Light Plan
Try us out
- Online meetings: 2/month
Up to 1 hour each - Slack: unlimited questions, 1 hr/month
- —On-site consulting: N/A
Basic Plan
Most popular. For serious use
- Online meetings: 5/month
Up to 1 hour each - Slack: unlimited questions, 2 hrs/month
- —On-site consulting: N/A
Premium Plan
Full partnership
- Online meetings: 10/month
Up to 1 hour each - Slack: unlimited questions, 5 hrs/month
- On-site consulting: on request
Travel & accommodation billed separately
Client Testimonials
“There aren't many people who can handle this area — truly a top-level professional.”
“Received very thorough answers that were extremely helpful.”
“Solved a bug I'd been stuck on for days in one session. Incredible technical skills.”
“Results exceeded expectations. Top-class technical skills — it felt like no error was unsolvable. Wonderful personality too. Very satisfied.”
AI Advisor FAQ
Q.How soon can we start?
Same day. Invite us to Slack and start asking immediately.
Q.Can we only ask about AI?
No. Websites, servers, security, vendor selection — anything IT-related is fair game.
Q.Is a 1-month trial really possible?
Yes. Try for 1 month. If it's not a fit, you can stop there — no obligation.
Q.Does the advisory fee really pay for itself?
For example, a ¥1.7M vendor quote could be compressed to ¥1M. One vendor review can recover months of advisory fees.
Q.What is a generative AI advisor?
A generative AI advisor is a specialist in technologies like ChatGPT and Claude who supports your company's AI adoption on a monthly retainer. They review vendor quotes, develop AI strategy, and provide instant answers to technical questions — like having a tech lawyer for AI decisions.
Q.How is an AI advisor different from a typical IT consultant?
Traditional IT consultants focus on documentation and reports. Our AI advisor is an engineer who actively builds and operates AI products. We can handle everything from prototype creation to PoC development end-to-end.
Q.What does an AI advisor typically cost?
AI advisory services typically range from ¥150K-500K/month in the market. We start at ¥50K/month — the most affordable in the industry — and have achieved over ¥700K in vendor cost savings in a single engagement. Compared to hiring an AI engineer at ¥8-15M/year, our service costs just ¥600K/year.
Q.Is it remote only? Can we meet in person?
Light and Basic plans are online (Slack + Zoom). The Premium plan (¥200K/month) offers on-site consulting on request (travel and accommodation billed separately).
Start with a 30-minute free consultation
"Do we even need an AI advisor?" — we'll help you figure that out in the free consultation.
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