Fujifilm Microfine black an white ultra fine grain film developer. Official capacity is 8 rolls of 135/36 or 120 film per litre. Stock solution is to be mixed with water at 120F. Suggested agitation is constant first minute and then five seconds per minute thereafter.
Personal note: I typically use this developer at 1:1 for ISO 100 films such as Acros, TMX, Kentmere 100, Fomapan 100. In 1 litre bottles the stock solution seems to hold for about six months (room temp 60-75F) but your mileage may vary.
Japanese SDS sheet may be found here: https://www.fujifilm.co.jp/msds/no4/result_kan.html?p1=6&p2=21