I just want to spend a few minutes to clarify the difference between these terms. There is some confusion out there and as soon as three people repeat the wrong thing it becomes truth.
Meito: This is a sword with a name (a Gō 号). Any sword can have a name. What we primarily care about this though is a historical name, that is, the blade in question had a name during the Edo period. An example here is the Sunnokina Masamune. It is simply a Masamune that came down through the Edo period with a nickname. This term meito is also used to casually indicate swords of great quality and importance, that may in fact have no name (but we imagine they would be worthy of one). There are no legal restrictions on ownership or movement of meito. Sometimes the NBTHK will indicate a name for a sword in the Juyo or Tokuju papers, in other times it can be discovered through other books or often on the sayagaki where an authority has preserved the name. Sometimes the name comes down with no history at all.
Meibutsu: These are special meito that are on the list of the Kyoho Meibutsu Cho, the most famous swords in the country in Edo period Japan. These also have no restrictions on ownership. However, many of these also happen to be Juyo Bijutsuhin, Juyo Bunkazai and Kokuho and as a result of that kind of status, would be illegal to export from Japan. An example of this would be the Kanze Masamune.
All meibutsu are meito but not all meito are meibutsu.
Utsushi also sometimes take the name of the source blace, for instance Kunihiro coped the Yamanba-giri Chogi, the resulting copy also became famous over the years and so took on a similar name to the original, becoming the Yamanba-giri Kunihiro. Both blades in this situation are meito, but not meibutsu, and both are Juyo Bunkazai making them illegal to export from Japan.
We all dread the fatal flaw.
These tend to be hidden on rusty blades, and revealed by polish.
Depending on who made the blade and when, a fatal flaw will send the value to zero. Sometimes however, the balance of positives in a sword allow it to be appreciated and even paper to the top levels, with a so-called “fatal flaw” present.
Continue reading Fatality
It’s necessary to know that different experts from different time periods saw different swords, and those swords that they saw form the basis for their judgments. For instance Soshu Sadamune signatures have been recorded but today we can’t find those blade or some dispute is made over the signatures. Unfortunately we do not have the actual work and cannot comment on it, other than that an old expert thought it was good and included it in their oshigata references. This implies at least that the work was as good as the signature proclaimed it to be.
The problem here is demonstrated by a parable called The Blind Men and the Elephant.
Continue reading How many Motoshige?
As the sword will be judged differently by men of different interests, you must be very careful in its selection. Some are foolish enough to pass judgment on a sword which they cannot really understand, others will not speak the truth although they see it.
The merchant may speak falsely in order to sell his wares.
If a blade belongs to some nobleman, or if it is appreciated as a family treasure, or if the possessor is very proud of its supposed qualities, the true judgment will often be withheld through courtesy. When you would have any sword truly judged, you must commit it unreservedly to a judge of absolute sincerity.
— The Complete Manual of the Old Sword (ca. 1793)
Nothing has changed.
This book is free here on JSTOR.
Bear in mind there are some transcription errors. Since it was translated over 100 years ago there is some Olde Tymey romanization as well. I find these old books fascinating as sometimes they confirm things that took us a long time to get to. For instance, this book relays the story of Niji Kunitoshi changing his name to Rai Kunitoshi at the age of 38 and names him Magotaro.
With the most useful data we have now, the last signed and dated Niji Kunitoshi is indeed at the age of 38 and the first signed and dated Rai Kunitoshi blade appears at age 49. Until Tanobe sensei put the lid down on this theory, there was a lot more belief that these were two separate smiths. Rai Magotaro Saku is also on a blade which is now Kokuho (National Treasure) and attributed to Kunitoshi.
Sometimes the old books have truths in them that were forgotten, and in the meantime people came up with some new fanciful stories. Not everything in an old book is going to be agreeable. They are however important things that fill in the gaps or at least provide some fertile ground for modern analysis.