Business Manager visas, KK/GK incorporation, and visa renewals — handled in plain English by a licensed administrative scrivener. 500+ cases. Based in Osaka, serving clients worldwide.
Business Manager, work, spouse, renewal, and change-of-status applications — explained step by step in English.
Over 500 successful cases across company formation, visas, and business permits.
Work with us entirely in English — from your first call through filing and follow-up.
KINDLE GUIDE · BOOK 1
The 2026 Step-by-Step Guide for Foreign Entrepreneurs
Published on Amazon. A practical roadmap for entity choice, incorporation, visas, tax, banking, and day-one operations — by a working certified administrative scrivener (ASIN B0DGY15GZY).
Licensed gyōsei shoshi (administrative scrivener) support for the procedures foreigners most often need when starting or running a business in Japan.
Incorporation-aligned business plans, capital, office, and immigration filings for managers establishing or running a company in Japan. From scoping call to submission support.
From ¥120,000 · typical bundled company + visa paths available
Learn moreKK, GK, articles of incorporation, Legal Affairs Bureau registration, seals, and post-incorporation steps — explained in English with a single accountable coordinator.
From ¥48,000 · KK/GK packages quoted after review
Learn moreRenewals, change of status, work visas, spouse visas, permanent residence, and related immigration procedures for founders, employees, and families in Japan.
From ¥24,000 · fixed quote after free 30-min consult
Learn moreThe 2026 guide for foreign entrepreneurs — entity types, step-by-step incorporation, visa alignment, tax essentials, and banking realities before you hire counsel.
Available on Amazon · complements our done-for-you services
Buy on Amazon.com Full book pageIsamu Mugiuda (麦生田勇) is a certified administrative scrivener (gyōsei shoshi, 行政書士) and the representative of Mayuha Administrative Scrivener Office in Osaka. Since 2009, he has supported foreign entrepreneurs and inbound companies through company formation, visa applications, and business licensing in Japan, using AI-assisted workflows to keep the process fast and fully in English. The practice has handled 500+ cases to date.
He is also the author of Start Your Company in Japan: The 2026 Step-by-Step Guide for Foreign Entrepreneurs (Amazon Kindle), a practical guide to incorporation, visas, tax, and banking for founders starting a business in Japan.
Mugiuda has joined Aplash to extend his practice into full-spectrum Japan market entry: import/export, IOR/EOR, ACP, and cross-border advisory. Mayuha continues as the home for licensed gyōsei shoshi work here in Japan; broader market-entry engagements now route through Aplash.
Isamu Mugiuda has joined Aplash to extend Mayuha's practice into full-spectrum Japan market entry. Mayuha continues to handle licensed gyōsei shoshi work directly; for import/export, IOR/EOR, ACP, and broader cross-border advisory, that work now runs through Aplash.
Licensed administrative scrivener services: visas, company formation, registrations, and government-facing procedures in Japan.
Japan market entry, IOR/EOR, ACP, import-export, and cross-border business advisory for companies expanding into Japan.
Deep experience in Japanese filings and government formats
Companies, visas, permits — documented, repeatable playbooks
Remote-first; we work with clients on every continent
Sample stories from company formation, visa, and licensing clients (names abbreviated for privacy).
Mayuha made starting my business in Japan incredibly smooth. The AI-powered document preparation saved weeks of work, and having everything explained in English was a game-changer.
As a software engineer relocating to Japan, I was worried about the visa process. Mayuha handled everything professionally and my visa was approved on the first try.
Complex permit application handled smoothly. The AI-assisted document preparation was a real time-saver. We've now used Mayuha for three different permits.
Book a free 30-minute call. We’ll map realistic options, timelines, and indicative costs — before you commit.
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