T. Shiroiwa — Project Consultant

Project Consultant for Japan,
International Business & Strategy

I help individuals, companies, and teams move ideas into action.
From Japan market research and business support to strategy consulting
and story development — practical support grounded in real experience.

Contact Services
USC Alumni Trading Company 8yrs Gov't ODA Projects Former CTO Business Builder
Who I help

I can help if you need to

Enter or understand the Japanese market
Organize a business idea or project
Get research and operational support in Japan
Find a practical partner who can think and execute
Develop stories, scripts, or creative concepts
Get a reliable second opinion on your strategy
Services

What I offer

01 — Brain Rental

Brain Rental / Strategic Advisory

A thinking partner for business ideas, decision-making, planning, and problem-solving.

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02 — International

International Business Support

Research, coordination, operations, and execution support for clients working with Japan.

Japan Gateway →
03 — Project

Project Development

Support for new ventures, digital projects, e-commerce, marketing, and business structuring.

04 — Story

Screenwriting / Story Development

Scripts and story support for films, TV dramas, YouTube, and other media projects.

05 — Chachatto Homepage

Chachatto Homepage

Your website gets built while we talk. No briefs, no specs, no back-and-forth. Just a conversation — and a finished site.

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06 — Chachatto AIPILOT PROGRAM

Chachatto AI

Want a company-exclusive AI secretary? Keep your data off the cloud. A local AI assistant delivered on your own PC — no API fees.

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About
T. Shiroiwa
T. Shiroiwa
Project Consultant / Brain Rental

With over 8 years at a Japanese trading company managing government ODA projects across Oceania, Africa, and Central Asia, I went on to build my own company — launching women's media, e-commerce, and ad platforms. As former CTO of a color contact lens and cosmetics maker, I now provide consulting for private clients, businesses, and government, alongside screenwriting.

  • University of Southern California Alumni
  • 8 years at a Japanese trading company
  • Built women's media, EC, ad platforms
  • Former CTO, cosmetics & contact lens maker
  • Private, business & government consulting
  • Screenwriting & story development
Why work with me

Strengths

I understand both Japan and international business contexts
I combine strategy with practical execution
I work across business, technology, planning, and storytelling
I turn unclear ideas into concrete next steps
Process

How it works

01
Contact
02
Review
03
Consult
04
Proposal
05
Start
Pricing

Pricing

Initial consultation
Free(15 min)
After that
You decide the price

After each session, you decide what the consultation was worth to you.
Pay what you believe is fair. That's how Brain Rental works.

Need a reliable partner for Japan,
business development, or strategic thinking?
Let's talk.

Contact now