|Weight without Saya
Naked Blade (Toshin)
||18.5 cm (Nakago 15.4 cm)
|| A= 0.59 cm
B = 0.68 cm
|| A= 0.42 cm
B = 0.47 cm
||Koshi Zori / Bizen Zori (curvature on the 1st third)
||Ko Kissaki (short length)
||Shinogi zukuri (diamond shaped) with Bohi (grooves)
||Maru Mune (rounded) with Kiri kani
||Ko Suguha (narrow straight line)
||Ayasugi (waving grain),
typical from the Gassan School, reproducing the veins of Japanese cedar.
||Ko-Maru (rounded return in small circle), with a short Kaeri
||O'Suriage (shortened) Machi Okuri, 15.4cm, signed 月山 "Gassan", through groove on the Omote side, Yasurime Kiri (horizontal), Ichimonjigata, end in Kirijiri (straight).
||Weight of 149g, length 59.9cm, Aventurine glitter lacquer with Kuroro wavy strokes overlay. Koiguchi, Kurigata and Korijiri in horn. Bicolored Sageo in silk with cross in colored strings.
|- Tsuka: length 18.5cm, Good quality White Same, Braiding in blue-green in Tsumamimaki type; Fuchi Kashira with an emboss of a Kabuto blade, Fuchi with a design of crab and shell, Kashira with a design of octopus, carp and lobster; Menuki with a design of a Shell.
- Tsuba : weight 109g, external dimensions 6.45 cm x 7.02 cm x 0.55 cm. There is a Kozuka Hitsu, and an obturated Kogai Hitsu. Surface with a design of stone Ishime, with 3 & 4 hollows on each face. There's a similarity with the Shoami productions.
- Habaki: 30g in silver, design of Nekogaki Yujo.
- Seppa : 2x4.5g serrated Seppa in silver.
|Gassan School :
The Gassan school originates in Mount Gassan, in the old prefecture of Dewa, nowadays Yamagata prefecture (between Niigata and Sendai). It is particularly known and recognizable by its Ayasagi Hada grain.
According to the tradition the Gassan lineage goes back to the Kamakura era (≃ 12th century).
The first smith would be Kiyomaru (also named Oniomaru) and the first Gassan was active arount the 1190's. The Gassan blacksmiths were devout practitioners of Shugendo, and it is supposed that their blades were more for the funeral rites than war.
The Ayasugi Hada is indeed a reference to the Japanese Cedar which is a sacred tree.
Unfortunately the Gassan lineage was extinct during the Edo era, and one had to wait until the 19th century for this school to be respawned thanks to Gassan Sadayoshi and Gassan Sadakazu.
The Gassan school is, to this day, one of the most prestigious blacksmith lineage.