蝦夷方言藻汐草

Tamura explicitly identifies harkiso as the seat on the right when entering, called 左座 from the opposite viewpoint; Nakagawa supplies the same left/right explanation. Hirayama pairs the recorded ハルキシヨ with 炉（右座） and compares the modern seat name. The close form and contextual sense justify medium confidence. The viewpoint remains inferred, and historical シヨ is preserved rather than silently corrected. harukiso is a more vowel-explicit comparison with no retrieved corpus match.