The circle indicates the time we are discussing in this section
The type of Tanto during the Nanboku-Cho Period was called Hirazukuri-Kowakizashi-Sunnobi-Tanto. Hirazukuri means a flat sword without the Yokote line and without Shinogi. Ko-Wakizashi means a shorter sword. Sun-Nobi Tanto means longer than standard. This is called Enbun Jyoji Kowakizashi Tanto. It is called this way because the majority of this type was forged around Enbun, Jyoji Imperial era. Imperial Era is that each time the Emperor changed, Japan changed the names of the era. Enbun was from 1356 to 1361, Jyoji was from 1362 to 1368.
Shape (Sugata 姿) ——-The length of Tanto should be 1 shaku or less. Shaku is an old Japanese measurement unit, which is very close to 1 foot. 8.5 sun (old Japanese measurement unit) which is approximately 10 inches is the standard length Tanto called Jo-Sun Tanto. Anything longer than Jo-Sun Tanto is called Sun-Nobi Tanto. Anything shorter than Jo-Sun is called Sun-Zumari Tanto. Most of the Nanboku-Cho Tanto is approximately 1 foot 2 inches long, therefore they are called Hirazukuri-Kowakizashi-Sun-Nobi Tanto. Sakizori (curved at the top. See the illustration above). Wide width and thin body. Fukura Kareru (No Fukura). Shin-no-Mune. See the illustration below.
Hi, Horimono (Goove and engraving 樋, 彫刻) —– Groove on Mune side. Bonji (Sanscrit, described in 17 Bonji Suken), Koshi-bi (Short groove) and Tokko- Tsuki Ken, or Tumetuki Ken (see below) appears. Ken (spear) was curved wide and deep in the upper part, the lower part was curved shallow and narrower. This is called Soshu-Bori.
Hamon (Tempered line) —– Narrow tempered area at the lower part, it gradually grows wider as it goes up toward the top then same wide Hamon goes into the Boshi area. Hamon in Kissaki area is Kaeri Fukashi (turn back deep) as the illustration below. Coarse Nie. O-Midare (large irregular pattern).
Jitetsu or Jihada —– Loose wood grain pattern called Itame. Yubashiri (discussed in 17 Yubashiri, Chikei.jpg), Tobiyaki (Irregular patches of tempered metal) appears. Crowded Tobiyaki is called Hitatsura (illustration above).
Nakago (Tang) —- Short Tanago-bara.
Sword-smiths during Nanboku-Cho Period Soshu Den(school)
Soshu Den ———————————————————-Hiromitu( 広光) Akihiro (秋広) Yamashiro Den ————————————————–Hasebe Kunishige (長谷部国重) Bizen Den ——————————————————— Kanemitu (兼光) Chogi (長義 ) Arima Province ——————————————————Hojoji Kunimitsu (法城寺国光 )