Nagasa: 2 shaku 2 sun 6 bu kyo. This sword is a famous blade that has been handed down since ancient times as a work by Yamashiro Rai Kunimitsu. However, in the current Hozon Token kantei, it has been attributed to Den Chiyozuru from around the Oan era (1368) of the Nanbokucho period (646 years ago), belonging to the lineage of Yamashiro Rai Kuniyuki. It is said that the origin of the Chiyozuru school began when Yamashiro Rai Kuniyasu moved to Echizen. This sword was originally a tachi of over 2 shaku 6 sun, now made into an o-suriage mumei katana. The kissaki is slightly extended, showing the Enbun-Joji sugata of the Nanbokucho period with a slight sori. The jigane is a finely packed ko-itame hada with some itame appearing. The hamon is a notare midare-ba mixed with warabite choji-ba in the style of the Yamashiro Rai school, which is why it has been traditionally passed down as a sword by Rai Kunimitsu. As it has recently come out in an "u-nama" (fresh/unfiltered) state, we are offering it at a special low price. Please enjoy this famous blade long-reputed to be by Rai Kunimitsu.
mumei · Nanbokucho · nagasa 68.4cm · sori 2cm


















Yamashiro-den · Echizen
10 pieces on the market now
The Chiyozuru lineage took root in Echizen Province during the Nanbokuchō period, and the setsumei consistently trace its origin to Rai Kuniyasu (来国安). He is said to have been born in Yamashiro Province, with one tradition holding him a grandson of Rai Kunisue; he later moved to Echizen, where the meikan place him around the Jōji and Sadaji eras (ca.
1362 to 1368). A parallel tradition, recorded on the signed tachi attributed to Morihiro, names Chiyozuru Kuniyasu[[c:1]] as a disciple of Rai Kuniyasu and the founder of the line. Learn more →
| Smith | Era | Designated |
|---|---|---|
| Kuniyasu國安 | 1345-1350 | 4 |
| Ieyoshi家善 | 1487-1489 | 0 |
| Kagemori景守 | 1394-1428 | 0 |
| Munemitsu宗光 | 1441-1444 | 0 |
| Iemasa家正 | 1492-1501 | 0 |
We could not find an authenticity certificate on the seller’s listing. Japanese swords and fittings are normally papered by the NBTHK (or the NTHK). Without one, the attribution is the seller’s own assessment and has not been independently verified — treat it with caution and ask the dealer about certification before buying.
For returns due to customer circumstances, the cost is the customer's responsibility. For returns due to our mis-shipment or a defective item, we bear the cost.
Nagasa: 2 shaku 2 sun 6 bu kyo. This sword is a famous blade that has been handed down since ancient times as a work by Yamashiro Rai Kunimitsu. However, in the current Hozon Token kantei, it has been attributed to Den Chiyozuru from around the Oan era (1368) of the Nanbokucho period (646 years ago), belonging to the lineage of Yamashiro Rai Kuniyuki. It is said that the origin of the Chiyozuru school began when Yamashiro Rai Kuniyasu moved to Echizen. This sword was originally a tachi of over 2 shaku 6 sun, now made into an o-suriage mumei katana. The kissaki is slightly extended, showing the Enbun-Joji sugata of the Nanbokucho period with a slight sori. The jigane is a finely packed ko-itame hada with some itame appearing. The hamon is a notare midare-ba mixed with warabite choji-ba in the style of the Yamashiro Rai school, which is why it has been traditionally passed down as a sword by Rai Kunimitsu. As it has recently come out in an "u-nama" (fresh/unfiltered) state, we are offering it at a special low price. Please enjoy this famous blade long-reputed to be by Rai Kunimitsu.
mumei · Nanbokucho · nagasa 68.4cm · sori 2cm


















Yamashiro-den · Echizen
10 pieces on the market now
The Chiyozuru lineage took root in Echizen Province during the Nanbokuchō period, and the setsumei consistently trace its origin to Rai Kuniyasu (来国安). He is said to have been born in Yamashiro Province, with one tradition holding him a grandson of Rai Kunisue; he later moved to Echizen, where the meikan place him around the Jōji and Sadaji eras (ca.
1362 to 1368). A parallel tradition, recorded on the signed tachi attributed to Morihiro, names Chiyozuru Kuniyasu[[c:1]] as a disciple of Rai Kuniyasu and the founder of the line. Learn more →
| Smith | Era | Designated |
|---|---|---|
| Kuniyasu國安 | 1345-1350 | 4 |
| Ieyoshi家善 | 1487-1489 | 0 |
| Kagemori景守 | 1394-1428 | 0 |
| Munemitsu宗光 | 1441-1444 | 0 |
| Iemasa家正 | 1492-1501 | 0 |
We could not find an authenticity certificate on the seller’s listing. Japanese swords and fittings are normally papered by the NBTHK (or the NTHK). Without one, the attribution is the seller’s own assessment and has not been independently verified — treat it with caution and ask the dealer about certification before buying.
For returns due to customer circumstances, the cost is the customer's responsibility. For returns due to our mis-shipment or a defective item, we bear the cost.