these are the documents required for visa application if you are going alone:

1. saving or current account statement with a minimum of RM6,000.00
2. return flight ticket
3. hotel confirmation letter/notice
4. letter from your current employer on letterhead, signed by your direct superior or HR. information to be included: your passport number, designation, monthly salary, duration of tenure and number of days you are going to spend in japan
5. photo with white background (just inform the photographer that you are applying for japan visa)