蝦夷方言藻汐草

The source pairs シシヤモ with シシヤム and marks them 共通, supporting their identification with sisam “Wajin”. The final o could reflect the Japanese rendering of a final consonant or a historical pronunciation variant; the witness does not establish one explanation. Sisamo is retained as a literal comparison, with no corpus match. The cause of the vowel difference remains uncertain. The broad heading 人 and the distinct positional homonym sisam remain qualifications.