No.18

報告書の図版番号/Plate No. of the report：PL. 7-2

解説：7号竪穴では長軸上に複数の炉が検出された。写真中央の石組みの痕跡が残る炉（炉a）が古く、それを挟んで南北にある炭化材で囲まれた二つの炉（炉b）が新しいと判断された。前者が7a号、後者が7b号竪穴の段階に対応するとみられる。

comment：In Pit House 7, several hearths were found along the long axis. The stone-lined hearth in the center of the photograph (Hearth a) is regarded as being older, and the two hearths in the north and south of it surrounded by carbonized woods (Hearth b) are considered to be newer. The former seems to belong to Pit House 7a and the latter to Pit House 7b.