To start a business in Japan, choose a business structure (e.g., GK or KK), reserve a company name, prepare articles of incorporation, notarize them (for KK), open a bank account, deposit capital, register the company at the Legal Affairs Bureau, obtain necessary licenses, and register for taxes. Hiring local advisors and understanding visa requirements is essential for foreigners. https://www.tradeflockasia.com/how-to-start-a-business-in-japan/