Minamoto Ippō katana with saidan mei, Kin Zogan mitsudo Test by Nezu Saburōbei Mitsumasa kaō

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Minamoto Ippō katana with saidan mei, Kin Zogan Nezu Saburōbei no Jō Mitsumasa cut [with this blade] on the
sixth day of the twelfth month of Genroku three (1700), year
of the horse, through three bodies.

 

Mei  (銘文) ‒ Signature: Gōshū-jūnin Sasaki Nyūdō Minamoto Ippō

(江州住人佐々木入道源一峯) ‒ “Layman Sasaki Minamoto
Ippō, resident of Ōmi province”

Kinzōgan-mei on reverse: Genroku san kanoe-umadoshi jūnigatsu muika ‒ Mitsu-dō
otoshi Nezu Saburōbei no Jō Mitsumasa + kaō (元禄三庚午
年十二月六日・三ッ胴落、根津三郎兵衛尉光政「花押」) ‒
“Nezu Saburōbei no Jō Mitsumasa cut [with this blade] on the
sixth day of the twelfth month of Genroku three (1700), year
of the horse, through three bodies.”

Tsukurikomi (造り込み) ‒ Shape: shinogi-zukuri, iori-mune

Kitae (鍛) ‒ Forging: dense itame, tending towards ko-itame

Hamon (刃紋) ‒ Hardening: rather wide chū-suguha

Bōshi (鋩子) ‒ Hardening in tip: sugu with a rather pointed kaeri

Nakago (中心) ‒ Tang: mekugi-ana (目釘穴) 1, yasurime (鑢): ō-sujikai

Made around Tenna (天和, 1681-1684)

 

Nagasa 63.4cm

Sori 1.8cm

Motohaba 3.05cm

Motokasane  0.73cm

Sakihaba 21.2cm

 

 

IPPŌ (一法), Jōō (承応, 1652-1655), Yamashiro – “Jōshū Fujiwara Hokkyō Ippō” (城州藤原法橋一法), “Heki Yamashiro no Daijō Minamoto Ippō” (日置山城大掾源一法), “Heki Yamashiro no Kami Minamoto Ippō” (日置山城守源一法),
real name Heki Ichinojō (日置一之丞), he also bore the first name Saburōzaemon (三郎左衛門) and belonged to the school of Ishidō Korekazu (石堂是一),
he worked in Kyōto but it is said that he also made some blades in Edo, hiro-suguha with saka-ashi

IPPŌ (一法), Genroku (元禄, 1688-1704), Musashi – “Tsushima no Kami Tachibana Ippō” (対馬守橘一法), “Tsushima Nyūdō Tachibana Ippō” (対馬入道橘一法), 
according to a theory this was the nyūdō-gō of the Ishidō smith Tsushima no Kami Tsunemitsu (常光), other see him as a separate smith, there exists a date signature of the eleventh year of Genroku (1698)
 with the age of 73 which would support the theory that this was a pseudonym of Tsunemitsu that he used in his later years, other sources list Ippō also with another gō, Chikyū (知休), which was in turn used by Tsunemitsu too

IPPŌ (一峯), 1st gen., Keian (慶安, 1648-1652), Ōmi – “Ippō” (一峯), lived in Sasaki (佐々木) in Ōmi province, he belonged to the Ōmi-branch of the Ishidō school (石堂), suguha, gunome-midare, chōji-midare, suguha mixed with midare,
notare-midare, also with nie and sunagashi, it is said that he also used nanban-tetsu, wazamono, jō-saku

IPPŌ (一峯), 2nd gen., Genroku (元禄, 1688-1704), Ōmi/Edo – “Gōshū-jūnin Sasaki Zenshirō Minamoto Ippō” (江州住人佐々木善四郎源一峯), “Gōshū-jūnin Sasaki Nyōdō Minamoto Ippō” (江州住人佐々木入道源一峯),
real name Sasaki Zenshirō (佐々木善四郎), he moved later to Edo and settled there in the Akasaka (赤坂) district, chōji- midare, gunome-midare,
 suguha mixed with midare, notare-midare, he also hardened a chōji-gunome-midare in the style of the Ichimonji school, it is said that he also used nanban-tetsu, wazamono, jō-saku