Had a chance to check Narita Terminal 2 duty free around 11am last Thursday and then Terminal 1 duty free around 2pm on Monday.
At T2 I was able to score one bottle of Hibiki 21 Kacho Fugetsu. At T1 I grabbed one bottle each of Hibiki 21 Kacho Fugetsu and Hakushu 18 Limited Edition. Some notable OOS misses were Yamazaki 18 LE in T2 and Fuji Sanroku 18 LE in T1.
These were from FaSoLa shops, 50,000 JPY apiece.