Sources

Sources

Encyclopaedias

1. 肥後守国康 (Higo no Kami Kuniyasu), Japanese Wikipedia
2. 刀剣の業物一覧 (tōken no wazamono ichiran), Japanese Wikipedia
3. List of Wazamono, English Wikipedia
4. Higonokami, English Wikipedia

NBTHK

1. NBTHK, Japanese Sword Museum: list of the exhibition “Nihontō omote to ura no sekai” (2020)
2. NBTHK, Sword Journal no. 750 (July 2019)

Researchers

1. Japanese Sword Index, “Shinto Swordsmith Ranking” (Tomita Kiyama’s ranking)