I am looking for my grandfather, Koogaku Takahashi, who lived in Saitama-Ken between 1890 and 1920. I believe he was a blacksmith. It is possible his father and his grandfather made swords. Koogaku was married to Natsu. Then he moved to Nagano-ken. Their only son was Tetsuzo. Please contact me at abfuzzy @mindspring.com.