A controversy of study begs this head-master to share his post. There are two opinions advanced in reference. 
 

Examination of the available material shows two distinct style patterns in SUGATA, YAKIBA, BOSHI, KAERI, NAKAGO and MEI. There are no overt similarities. While one work states Two-characters was the elder brother who died and others, the father, MAGOTARO KUNITOSHI "Best Grandson" banners the new head of an inherited RAI forge. MAGOTARO, third from RAI TARO, created a new "FUNBARI" over the exhausted KEN-CHO, full YAKIBA expansion to give the country a clear, new path for the SUGATA 
styles of late-KAMAKURA. 
The KUNITOSHI career ends with a noted passing in 1316. 
 

"Two-characters" NIJI KUNITOSHI KO-AN 1278 (f: KUNIYUKI, grf: KUNIYOSHI):  

The constant outpour from OSAFUNE won a faddish national acceptance of GUNOME by KO-AN 1278. NIJI was head of the KYOTO RAI and his powerful pieces contrast, utterly, the refined imposition of SANJI's recall of graceful HEIAN FUNBARI. His new tapering brought a new path for the country and an established RAI style for SHO-O 1288. SANJI enjoys his success as students, RYOKAI, MITSUKANE and all others mix RAI SHIBUI in their travels.

This sword is the food-source for all KUNITOSHI descriptions. 
JI-NIE dresses standing KO-ITAME. 
KAWAZU tadpoles play in a DAIBO forest. This CHOJI does not mimic the ICHIMONJI as is often written. The rounded heads crowd and lean. Forms are balanced yet dynamic, the high reaching line still teasing the HA in places. Quietly, the URA is nearly twice the height. A theme carried through the crowded BOSHI where the URA KAERI paints double lines. 
The original NAKAGO is retained with three MEKUGI-ANA showing multiple mountings. 
                                      ^MEI: KUNITOSHI

HIRA-TSUKURI,IHORI-MUNE, wide-bodied TANTO. SU-KEN on OMOTE, BO-HI/SUE-BI extends on the URA.

KO-ITAME HADA is veiled in JI-NIE and RAI NIE-UTSURI.

A bright NIOI-GUCHI has KO-NIE where ASAKI-NOTARE undulates high-reaching GUNOME with TOGARI. KO-ASHI IRI defines.

MIDARE-KOMI BOSHI has TOGARI in the head.

Two MEKUGI-ANA on HA-AGARI NAKAGO. Signed large, NIJI MEI:
                                                                                                                   KUNITOSHI

RAI NIJI KUNITOSHI, a true Samurai sword. Powerful. A blend of the old KENUKI with the power of mid-KAMAKURA.
 

UESUGI KENSHIN KYO-ROKU 3, 1530 to TEN-SHO 6, 1578. Vassals of the UESUGI, he was born NAGAO SARUMATSU-MARO, "The Pine Monkey," he became KAGETORA. His useless elder brother inherited and KAGETORA, 11, gave up and become a priest: SHUSHIMBO, traveling throughout the country.

At HIEI-ZAN he met UESUGI clansman, USAMI SADAYUKI, who had fought his father until a peace in 1538. SADAYUKI convinced KAGETORA to return. 

At 13, with the help of SADAYUKI, he returned to ECHIGO, deposed his brother and first gained attention by placing control over brother-in-law, NAGAO MASAKAGE. 

When KAGETORA was 21, UESUGI NORIMASA sought refuge from another beating by HOJO UJIYASU, one of the ODAWARA father/son team engaged in the KANTO. 
His condition to NORIMASA was KANRYO "Governor," a full adoption into the UESUGI family-line, and ECHIGO-no-KAMI - Rank and Title. 

One year later, he shaved his head and became KENSHIN. 

Another year, 1553, he accepted an alliance with MURAKAMI YOSHIKIYO to protect their common real-estate from the TAKEDA. Thus brought history the most protracted series of Samurai battles 

                                                  - at KAWANAKAJIMA... 

Their four major encounters were every year skipping only the summer of 1555. TAKEDA SHINGEN's run for KYOTO was annually checked every summer by UESUGI KENSHIN.

KENSHIN was checked by the ASHIKAGA SHOGUN's order to repress the HOJO. Everybody all taken up. The TAKEDA had ODA and IYEYASU in the winter and KENSHIN in the summer (See SHINGEN), KENSHIN had the HOJO at ODAWARA.

Declaring on the HOJO, SHOGUN YOSHITERU gave, from his own name, "TERU" to join with KAGETORA's, "TORA" then becoming UESUGI TERUTORA "The Shining Tiger" of ECHIGO.

He now fought SHINGEN and the HOJO. Eventually, the SHOGUN settled by having KENSHIN adopt HOJO UJIYASU's seventh, who took KENSHIN's "KAGETORA."

This peace allowed full attention to SHINGEN, which left open his flank for a ripe try by ODA NOBUNAGA. While re-orienting, KENSHIN fell sick and died at 48.