尺一 (hiragana しゃくいち, romaji shakuichi)
From Middle Chinese compound 尺一 (tsyhek ʔjit, literally “foot (measure) + one”).
尺一 (hiragana せきいつ, romaji sekiitsu)
Compound of 尺 (shaku, “shaku”) + 一 (ichi, “one”).