Just got back from japan.

Tried
yam 25
h30
hakashu 25
chichibu HBA mizunara
chichinu HBA sherry refill
ichiro malt and grain ritz Carlton
yamazaki owners cask ritz Carlton
blantons gold

Hauled back the below
Honestly, Amazon is the way to go. Hunting is a waste of time in larger cities like Osaka, Kyoto, and Tokyo unless you have a relationship with a store or are fluent in Japanese.
2x blantons SFTB (Amazon)
yamazaki watami founders choice (Amazon)
ichiros malt grain world blended limited edition (Amazon)
hibiki 21 (narita, imho 50000Y is the new retail for h21 and yam18 unless you really do some serious hunting or get lucky stateside)

Wanted but did not find/care enough
h30 at narita but no luck
blantons black, would rather use luggage space for STFB
blantons red, see above

Scoped the below (didn’t have time to really hunt)
LH has H30, tons of yam 18, just got ichiros double distillery, blenders choice, Hakushu 18
yamazaki has nothing, but went late in the day
Biccamera Kyoto nothing
isetan Kyoto Station nothing
random grocery stores in Roppongi with nothing

i keep editing as I recount the trip through the jet lag.