Alternative spelling of 上代特殊仮名遣

Clipping of 特殊相対性理論 (tokushu sōtaisei riron, “special relativity”).

one day, 24 hours / the daytime, the period from dawn until dusk / (figuratively) a short period of time / one day, someday, an unspecified day / the first day of the month

(literally) one side / everywhere, all around, the whole area / one viewpoint, one opinion or way of thinking / the front page of a newspaper

for the time being, for the present

the basics, a general idea

Panax ginseng (Chinese ginseng)

Alternative spelling of 五種競技 (“pentathlon”)

pentathlon

Kyūjitai form of 外来種: introduced species