Sa shi tansaku

Sa shi tansaku

Sa shi tansaku

Sa shi tansaku

Sa shi tansaku

Sa shi tansaku

Sa shi tansaku

Sa shi tansaku

探賾算法

Fukusuu mojiretsu no tansaku ni kansuru kenkyuu

Dāin shi sekai isshuu gakujutsu tanken jikki

Tekiouteki tansaku ni yoru hatsuden puranto no sukejūringu

Toshi kuukan no keiro tansaku ni kansuru kenkyuu

Tantō (Dagger) Inscription: “Sa / Chikushū jū

Tsuda soukichi shi no taigyaku shisou

Haku shi no shi

Shi shi kyouikuron

Bokkoku shokumin ni kansuru jōnsu shi no tanken houkoku

Kan ／ shi

Kanda shi saitou shi eibunpou sankou

Choubunsan kankyou ni okeru jouhou tansaku ni kansuru kenkyuu

Jouhougen no kouzou suitei : kakuritsu moderu no kouzou tansaku arugorizumu

Kaaru morittsu shi sakuhin ; yosefu hofuman shi sakuhin

Kousanka busshitsu no tansaku to bisphenol yuudoutai no kousanka kassei

<i>Tantō</i> short sword signed “Sa“ and “Chikushū-jū“