Just yesterday Hokuriku-based Wakatsuru Saburomaru Distillery released "Junenmyo Half Decade" specifically for their home region, Hokuriku.
Per their announcement it contains "selected whiskies from several barrels aged over 5 years old." Assuming it contains whisky actually distilled at the Saburomaru Distillery, that would be from the pre-crowdfunding era. This puts it in similar crowd with their other imported/blended releases like Moon Glow. Just judging by the image they've released, it appears quite young!
3500 yen for 700ml at 40% abv, but given they've said it is specifically only being sold in Hokuriku, good luck finding it elsewhere.
Whiskey Richard is the founder of nomunication.jp, and has been saying he has lived in Japan for ten years for the past four years. He enjoys drinking basically anything except straight-up Campari.