Foreign residents in Japan are usually granted visas lasting 1, 3 or 5 years. However, that does not mean that the foreign national must leave the country at the end of the visa term. In general, Japanese visas may be renewed continuously, which allows the visa holder to stay in Japan for extended periods.
Interest-free loans are allowed under the Japanese Civil Code so parties are free to contract into zero-interest loan agreements as they wish. However, there are limits on how much interest a lender can charge on a loan. The Interest Rate Restriction Law provides that the maximum allowed interest rate is 15% annually for amounts of 1 million yen or more.
One of the requirements to establish a company in Japan is to prove that the requisite money for the initial investment is available. However, since this proof is required before the company is formed, the yet-to-be-established company will not have a bank account yet. Therefore, the initial investment must be deposited into the bank account of one of the founding members.
One of the main requirements to obtain a patent is that the invention not be known to the public. This prevents people from patenting inventions that are not special and unique to the inventor. Therefore, it is important to keep an invention secret until you’ve had a chance to discuss patenting it with an attorney.