My main time-consumer is trying to find year info on my unmounted stamps
Consider this your apprenticeship, as a World wide collector.
(Not many of us left)
The really difficult, you can post on this forum for ID.
Another option is to go to eBay
, and search for "Japan" place the stamp value, and any other avail info, and see if it pops up there.
Japan is a general toughie for Identification, make sure your stamp is not a "Prefecture" that increases the difficulty.
My database came up with 25 "birds"
There is a green "Cuckoo" bird at Scott 598 and 1067 (3 yen)