Alternative form of 山河 (sanga)

(literary) mountains and rivers

The Japanese festival for children; a traditional rite of passage and festival day in Japan for three- and seven-year-old girls and three- and five-year-old boys, held annually on November 15. As Shichigosan is not a national holiday, it is generally observed on the nearest weekend. Similar to こどもの日 (Kodomo no Hi, literally “Children's Day”)

being in the mountains or woods / being in the temples

Kyūjitai form of 養蚕: sericulture

散飯, 生飯:

酸化物: (chemistry) oxide (binary compound of oxygen)

アスパラギン酸: (biochemistry) aspartic acid

油酸: (organic chemistry) oleic acid

オレイン酸: (organic chemistry) oleic acid