Previous answer is
Special feature : Founder of Fukuoka Ichimonji school is Norimune. Him and Narimune, Naomune, Muneyoshi, Munetada, Shigehisa, Sadanao are the most old generations of Fukuoka Ichimonji school and they are called as ‘Ko-Ichimonji’, which means ‘old generations’
Koichimonji is very similar with Kobizen or Koaoe school.
Old Koto blade shinogi ji must be Koitame or itame hada ,mokume hada
It is very important whether the blade is old or not old.
If the shinogi is engraved Bo-hi, you must check the blade very carefully.
Sometimes we can see some swords which were judged as old Koto blade but the shinogiji is masame hada.
In that case, the blade might be new swords like shinshinto koto copy or changed shinto to Koto blade.
Also Utsuri is very important point. Koto Utsuri or shinto utsuri.
This sword is high quality jigane and also healthy vivid hamon.
Appraisal Quiz #440 (May 27th, 2017)
Who made this sword do you think ?
Hints. ※The picture will be enlarged
Blade length : 57.12 cm or 22.5 inches.
Sori :1.273cm or 0.5 inches.
Mekugi : 1
Width at the hamachi :3.83 cm or 1.5 inches.
Width at the Kissaki : 2.66 cm or 1.05 inches.
Kasane : 0.67cm or 0.264 inches.
Shape : The blade is 3.38cm wide and thick very healthy
big Gunome and long kissaki.
Jigane :Koitame hada well grained with jinie attach beautiful nice texture.
Hamon :From the hamachi, suguha and then gunome midare and oogunome midare like doranba with very thick nioikuchi
and thick ashi work.
1: Kesyo yasuri
2: bottom of the nakago shape.
3: Doranba hamon.
Answer will be posted at next Appraisal Quiz.
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