While sorting out items at her late father¡¯s home in Utsunomiya a few years ago, Tomomi Narusawa found a trove of printed materials and handwritten notes left behind by the retired high school teacher turned Japanese history researcher.

¡°I knew he was researching materials related to the war, but no one in the family?knew details about his work,¡± Narusawa, a 56-year-old nursing educator, recalled.

¡°When I was growing up, I saw him working at home with an English-Japanese dictionary in his hand. I had wondered what my dad, who taught social studies in school, used the dictionary for.¡±