Kyūjitai form of 太平天国 (“Taiping Heavenly Kingdom”)

an outdoor bath, often at a naturally occurring hot spring

(linguistics) sound shift / (linguistics) sound shifts from Old Japanese to Modern Japanese, especially those which are preserved in historical kana usage.

changing school

astronomical unit

2.5D / (by extension, fandom slang) belonging to a grey area between "2D" (anime, etc.) and "3D" (live-action, etc.), such as voice actors

(Buddhism) clairvoyance, one of the 六神通 (rokujinzū, “six abhijñā (“higher power”)”)

(archaic) rewards from the heaven; heaven's blessing

Tenroku era, a Japanese era from 970 through 973

(sex, informal) impotence