Club activities at Chiba Keiai Senior High School
| soccer | boys and girls volleyball | boys table tennis |
| boys and girls soft tennis | boys and girls basketball | boys baseball |
| soft ball | kendo | boys and girls track and field |
| boys and girls tennis | judo | co-ed dance |
| boys and girls badminton | water polo | |
| drama | calligraphy | radio |
| rock pop music | marching band | baton ( cheer-leading ) |
| debating club | art | tea ceremony |
| natural science | home economics | |
| photography club | manga |
| computer | astronomy | yachting |
| volunteer | ESS (English Speaking Society) | architecture |
| Japanese strategy game | rhythmic gymnastics | |