An o-suriage naginatanaoshi wakizashi from middle Nambokucho, attributed to Unju. Shallow bohi running less than half the length of the blade.Hawatare 1 shaku 6 sun 7 bu (50.60 cm / 19.92") Motohaba: 3.185 cm. Kasane at shinogi: 6.49 mm. Kasane at mune: 4.3 mm. Nie deki based suguba gunome notare midare. Profuse sunagashi, kinsuji nado. Jigane is hada tatsu o-itame nagare with areas of mokume, ji nie, chikei, nado. In polish, mounted in shirasaya with a gold plate nekogaki habaki. There are two small opening and a small fukure in the hamon. Rated Josaku in Nihon Toko Jiten - Koto-Hen, by Fujishiro. Valued at 6,000,000 yen in Toko Taikan by Tokuno. Double circle in Nihonto Meikan. Picture in Yumei Koto Taikan and Nihonto Zuikan - Koto hen. As of 1989 there were 39 juyo, six of which were naginatanaoshi. NTHK/NPO kanteisho.
The Unryu of Ukai in Bizen, moved from Yamashiro and their swords were made in the Yamashiro tradition. Unju was the son of the second generation Unsho. Dated works extend from Bunna 2 to Oan 7 (1353 - 1374) during the brief Northern Dynasty. There are no dated examples of, the shodai Unsho, the founder of the school. However Unji, believed to be his son, is represented by a blade dated in Showa (1315). $4,600
I remember seeing a Juyo Nagamitsu on display at the Honbu with a three inch fukure in the hamon. I also handle a Tokubetsu Juyo Mitsutada with a fukure running almost the length of the blade. So if the work is good enough, some problems may be overlooked.
Indicating Two Carbon Pockets and One Fukure
l l l
Fukure Carbon Pocket
Yumei Koto Taikan Nihon Toko Jiten - Koto Hen
Nihonto Zuikan - Koto Toko Taikan