What used to take a whole day
now takes thirty minutes.

On working alongside Mayu Mutoh — a young woman inheriting a family plumbing business on the Japanese coast — as she quietly stopped doing things the old way.

Hayama is a small coastal town about an hour south of Tokyo — sitting between forested hills and the Pacific, and best known for its quiet seaside pace. It is also home to a family-run plumbing and water-infrastructure company called Hayama Kanko.

The company is small. Three people on the day-to-day operations. Two women and one young man, working alongside a network of subcontractors on residential water systems and municipal infrastructure across the Hayama, Zushi and Yokosuka area. The person running the business day-to-day is Mayu Mutoh — director, single mother, and a rare young woman in a Japanese trade traditionally dominated by older men.

Since June 2026, R Agile Studio has been walking alongside Hayama Kanko on three fronts at once: a new website, hands-on AI coaching, and quiet re-design of the daily paperwork. This is not a flashy digital transformation story. It's a slower one — about the paperwork getting a little lighter, week by week.

Chapter 1The company, and the woman running it

Hayama Kanko is a certified water-utility contractor for the Zushi–Hayama–Yokosuka region, working on both new residential plumbing and municipal water infrastructure. It sits alongside a sister company, Sommelier Home — a construction firm led by Mayu's father, Seiji Mutoh. Two independent companies, one extended family, one shared regional context.

Inside Hayama Kanko, the day-to-day team is three people: Mayu; Yumi, who handles administration and is studying for her chief-engineer qualification; and Haruki, a young man in his early twenties responsible for on-site work. It's a small, unusually female-led team for a Japanese trades business.

Until recently, Mayu was carrying three roles at once — site supervisor, apprentice chief engineer, and back-office CAD designer — which is roughly what it sounds like: too much for one person to do sustainably.

Chapter 2Why a small plumbing company needed a website

The first thing we built together was a website — but not the marketing brochure you might expect.

In Japan, water-utility contractors operate in a delicate relationship with two audiences: the municipal water bureau that scores every project, and the neighborhood residents who live next to the roadworks. A visible, honest company website turns out to be part of the trust infrastructure that lets both audiences feel safe.

The site needed to answer, simply and clearly: Who are Hayama Kanko, what work are they doing on your street this month, and what does that work make possible for your everyday life?

Not to sell. To be known.

Chapter 3Five weeks to a live website

We started with a two-and-a-half hour working session at the kitchen table — Mayu's laptop, my Claude account, and one real task to work through together. From there, five weeks later, the website was live at hayama-kanko.jp (14 July 2026).

• Logo designed with Claude — three concepts, one unanimously chosen
• Domain: hayama-kanko.jp
• Static site hosted on Netlify
• Contact form via Netlify Forms + Resend for automated replies
• SEO basics, Google Business Profile, and an Instagram embed for daily field updates

Results by the day after launch:

• Ranked #1 on Google for the company's name
• Sitemap indexed by Google Search Console, nine pages picked up

Small numbers. But for a small company introducing itself properly to its region for the first time, they mattered.

Chapter 4The thirty-minute moment

A few days before the website launched, I sat down with Mayu again — this time to introduce her to Claude for desktop, in a mode that could reach into her files directly, not just chat.

The task in front of her was one she'd been dreading: transcribing a stack of PDF invoices into an Excel spreadsheet, line by line. Her usual method — do it by hand — took her about a full working day.

She dragged the PDFs onto Claude and typed one sentence: "Please turn these into an Excel sheet."

Her eyes widened. She looked at me and said, "Wait. What is this?"

That is the difference between a chatbot and an AI that can actually reach into your work. Not a novelty. A colleague who can do the boring parts.

From that day on, Mayu started opening Claude herself. Not as a replacement for her judgment, but as something to hand the small, repetitive things to — so she could keep her attention on the parts of the job that actually need her. Slowly, more of her working hours became hours she'd share with an AI, rather than hours she'd lose to admin.

Chapter 5What we're building next

With the website settled, we turned to the piece of the business that has always been Mayu's real bottleneck: construction planning documents.

Each new project requires a plan — safety procedures, construction methods, subcontractor coordination, materials. In Mayu's world, this document takes five to eight working hours to produce, and much of the quality lives in her personal memory. She is the constraint.

Together we're now designing a modular, AI-assisted version of that planning process — treating the safety and construction-methods sections as reusable building blocks the system can help assemble, rather than a blank page Mayu has to fill in every time.

The plan is to run a proper pilot in early 2027, funded in part through a Japanese small-business subsidy program. The goal isn't to remove Mayu from the process. It's to give her back the evenings she's been losing to paperwork, and to make the knowledge in her head shareable with the next person on her team.

A note from Risa

Two months into this partnership, I've learned some things I want to name.

A young woman inheriting a family business shouldn't have to carry it alone. There is a real, specific role for someone who can sit next to her, translate between the industry's traditions and what AI can now credibly do, and keep the pace human. That role is a good use of a coach's life.

AI belongs in rural, non-tech, tradition-heavy industries too. Not as a "digital transformation project" that lands from above, but as a series of small moments when the work gets one notch lighter — and the person doing it can feel it.

The moment Mayu whispered "wait, what is this?" is one I won't forget. It was the R Agile Studio idea — standing with every woman who's ready to take one step forward — showing up in a concrete piece of work, on an ordinary weekday, in a small office by the sea.

Where this goes

The work with Mayu and Hayama Kanko is still early. We'll keep writing about it here as it unfolds — carefully, and one step at a time.