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Thread: Koto Tanto Before and After Photographs...

  1. #1
    Join Date
    Mar 2002
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    Gaithersburg, MD USA
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    Smile Koto Tanto Before and After Photographs...

    General Nihon-to Information:

    Blade Type: Tanto (Yoroidoshi)
    Nagasa: 7.12 inches
    Tsukurikomi: Hira-zukuri
    Mune: Iori-mune
    Horimono: Left side (koshi-hi) Right side (gomabashi)

    Hataraki Information:
    Jihada: Masame
    Jihada Hataraki: Chikei
    Hamon: Gumone Midare with Nioi-deki
    Hamon Hataraki: None
    Utsuri: None
    Boshi: O-maru
    Kissaki: None

    Nakago Information:
    Nakago: Ubu
    Nakago Length: 2.91 inches
    Mei: Mu-mei
    Yasuri-me: Sujikai
    Number of Mekugi-ana: 1

    Koshirae Information:
    Style of Koshirae: Shirasaya
    Habaki: Simple one piece copper habaki with file marks.

    Historical Information:
    The tanto is a yoroidoshi knife used in close combat by Samurai and dates to the late Koto sword era more specifically the late Muromachi period (ca. ~1530 ACE). The nioi-deki style hamon and ji-hada is indicative of Mino Den tradition. The masame ji-hada is very common to tanto and is very difficult to determine which Mino school the maker of the tanto belonged to. The matching three file marks on the nakago and habaki indicates that the tanto was likely a product of mass production of weapons during a series of feudal civil wars that was accruing during the Sengoku period.

    Here are some before a after photographs of a Koto era yoroidoshi tanto I had polished. The style of polish applied to the tanto is Sashikomi. In the after photograph the masame ji-hada is clearly observed with the gunome hamon close to the ha. I was told that the tanto is likely Mino Den but a specific school is hard to tell because the masame ji-hada is very common in late Koto era tantos. The tanto is also a mu-mei which makes identification even harder. Any additional information or comments about the tanto are welcome. Thanks for taking the time to view my post.

    Before:
    Attached Images Attached Images  

  2. #2
    Join Date
    Mar 2002
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    Gaithersburg, MD USA
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    After:
    Attached Images Attached Images  

  3. #3
    Hi David,

    Is there a picture of the polished blade?

    REgards
    www.japaneseswordcollector.com

  4. #4
    Join Date
    Aug 2002
    Location
    UK
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    372
    I'm not so sure this is a Yoroidoshi what is the measurement of the kasane? All the ones I've seen and own are quite thin long almost needle like blades with a very thick kasane (1cm+). It just doesn't look long enough or thick enough to be a Yoroidoshi to me. More likely a Kaikan I think.

  5. #5
    Join Date
    Aug 2004
    Location
    Magenta, Northern Italy
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    4,210
    Seems slim to me too to be a Yoroidoshi...
    It had many polishises, hadn't it ?
    Hamon still healty ?
    Please forgive my english.

  6. #6
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    Mar 2002
    Location
    Gaithersburg, MD USA
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    Kasane...

    Yes the tanto has had many polishes and the hamon is narrow in places. The kasane of the tanto under the area of the Habaki where it was never polished is about 0.635 cm in thickness so it might not be a yoroidoshi after all. As for its length I have read about there being short as well as long yoroidoshi. Personally I have only seen photographs of longer yoroisdoshi as you describe Peter. Peter what is a kaikan? I am unfamiliar with the term.
    Last edited by David Stiles; 09-19-2005 at 06:17 PM.

  7. #7
    Join Date
    Mar 2002
    Location
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    Narrow hamon...

    Here is the photograph of the other side of the tanto notice the narrow hamon indicating that the blade has been polished many times in the past due to use.
    Attached Images Attached Images  

  8. #8
    Hi David,

    Can you post a clear picture of just the nakago please.

    Thank you.
    www.japaneseswordcollector.com

  9. #9
    Join Date
    Mar 2002
    Location
    Gaithersburg, MD USA
    Posts
    191

    Nakago...

    Here is just a photograph of the tanto's Nakago which is mu-mei. Any additional photos that would be helpful just let me know.
    Attached Images Attached Images  

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