To register a company in India from Japan, the key Requirements for Company Registration in India include having at least two shareholders and two directors (with one mandatory Indian resident director), obtaining DSC and DIN for all directors, providing notarized/apostilled passport and address proofs for foreign applicants, and submitting proof of a registered office address in India along with MOA and AOA. Foreign investors must also ensure name approval, comply with FDI rules, and complete post-incorporation steps like PAN and TAN. This process allows Japanese entrepreneurs to easily set up a business in India through Companies Next.