This is a Seki Naoto ishidzuki ebi-nata (stone-butt shrimp nata) from Seki Hamono Kaji Kojo (Seki Blade Smithing Factory) in Akita Prefecture. The front is stamped with "Ishino" and the back with "Seki Sei Hagane Tsuki" (made by Seki, steel-fitted). It has Seki's unique unfinished back. The factory is currently closed, making this a valuable item. I am selling it to organize my collection. The entire item has been painted for rust prevention. Total length: 380mm Blade length: 175mm Blade width: 50mm Blade thickness: 6mm All measurements are approximate. ★ The item for sale is only what is shown in the images. ・It is old, so there are stains, scratches, and marks. 　Please refrain from bidding if you are concerned about these. ・Please judge the condition of the appearance by looking at the images. ・I am an amateur, so I do not know the details. 　Please confirm everything before bidding. ・The actual color may differ from the images due to the shooting environment. ★ After the transaction, 　I do not offer any support. 　After the transaction, 　returns are not accepted for any reason, 　and I cannot accept any claims. The standard "N/C, N/R" (No Claim, No Return) applies. Please understand and consider the above before purchasing. Thank you.