Index of the free study
| Title | area | contents | remark |
| Miss A's report | Customs | The deplorable truth of girl hant method in Hiroshima region | from MIss A's experience |
| Mystery about "Jomo" | Geography / History | Why is Gunma Pref. is "Jomo"? Is there "Kamo"? The final report of my study for two years. | (Japanese only) |
| The Chofu Station Incident | History | I had a mixed feeling when I saw a show that based on the Ikedaya Insident. | (Japanese only) |
| What is "Kansui"? | Foodstuff | Doubt about Kansui, additives for chinese noodle. | (Japanese only) |