BialyLH

I have a Yokoyama Sukenaga signed as "Koka Gannen Nigatsubi" which would be around this date. there was a lot of arguing going on regarding if that date did exist. From what i managed to learn and research this date is 100% correct, and all misunderstandings came from different calendar systems. its another thing dated at this day, so i think there might be more to it

What do you mean, sir?

Thank you Moriyama San for giving your help as much as i could understand it. Sorry if previous message seemed rude, we probably misunderstood eachother. I appreciate your knowledge, just did not understand you. Thank You All best Daniel

Sure, I just didnt understand Moriyama san reaction, maybe there was some misunderstanding between us two, Sir Jussi below explained it spot on though, i feel i understand this topic better now. Thank you, All best Daniel

Thank you so much Jussi! You explained it spot on, i understand it much better from this point of view. I appreciate it a lot sir, Thank you! Daniel

Sir, i never said that I think that its valid, but sources say so, and asked for your explanation. If you are not going to help and keep being passive-agressive please do not reply at this topic. I tried to keep everything as friendly as possible, Im new in this topic and trying to gather informations, learn etc. Thank you, Daniel

Thank you for explaining, i may have messed up the Julian calendar and Gregorian, None the less, Everywhere i search there is said that 2nd month of Koka 1 is a valid date, Can you please explain why it is not in your opinion? Im open and curious for learning Thank you in advance Sir!

Yeah, me neither, thats why its so fascinating, yet Ray and Paul both looked at the blade together with Mei, and they matched it, so its a big unknown for now...

Regarding the date, Please note that Im really beginner in Nihonto topic, so my opinion may not be worth anything.. I have a feeling that there is some part of date missing on Mei, Knowing that Koka Era started at December 2, 1844 of Gregorian calendar, could Mei say this, rather than 2nd month? I may completly misunderstand the Kanji behind signature, if so then im sincerely sorry! Also ive tried help of chat gpt regarding the date, Here's what it says: "Kōka 1 (弘化元年) runs from Dec 2, 1844 (Gregorian) — the date of era change — through to about mid-February 1845, which is when the next lunar year begins. The 2nd lunar month of Kōka 1 then falls in late Feb to late Mar 1845. Only after the lunar New Year (around Feb 1845) does it become Kōka 2." "So as you can see, Kōka 1 doesn’t end with January or February—it continues through the intercalary month and into March. Therefore, a date like 弘化元年二月日 (a day in the 2nd lunar month of Kōka 1) corresponds to sometime in March 1845 (Gregorian)." Its a GPT only so it may be in complete wrong, Best regards, Daniel

I was afraid of that, unfortunetly, thank you buddy!

Thank you for answering! Yeah, especially as the sword is not from "reliable" source, it was a risky deal... Would posting more of a blade pictures help? Thank you in advance!

Thats what i was afraid of, unfortunetly my suspcions are coming closer and closer to being truth. Thank you so much for your reply!

Hello Everyone here, I have a sword in my colection, supposedly Yokoyama Sukenaga. Some pictures have been verified by Paul Martin and Ray Singer, They both agreed it looks okay, yet it doesnt match anything from their collections or experience. Maybe someone here can tell me more? Best regards!!