Tetsudou kamotsu tokubetsu chinritsu ni kansuru chousa

Tetsudou shuyou kamotsu ni kansuru chousa

Tokubetsu shisei ni kansuru chousa shiryou

Teikoku tetsudou tokubetsu kaikei ni kansuru kenkyuu

Teikoku tetsudou tokubetsu kaikei ni kansuru kenkyuu

Sovieto renpou tetsudou ni kansuru chousa houkoku

Yunyuu kamotsu housou ni kansuru chousa houkoku

Tokutei kuiki ni kansuru chousa

Tekkou ni kansuru chousa shiryou

Tekkou ni kansuru chousa shiryou

Tekkou ni kansuru chousa shiryou

Shunsan shiikuhou ni kansuru chousa : fu tokushu shiikuhou ni kansuru chousa

Shunsan shiikuhou ni kansuru chousa : fu tokushu shiikuhou ni kansuru chousa

Shunsan shiikuhou ni kansuru chousa : fu tokushu shiikuhou ni kansuru chousa

Tokubetsu gakkyuu hensei ni kansuru chousa

Jukei shounen ni kansuru tokubetsu chousa

Kome ni kansuru chousa

Kome ni kansuru chousa

Kome ni kansuru chousa

Shio ni kansuru chousa

Mugi ni kansuru chousa

Kome ni kansuru chousa

Denki tetsudou fumikiri zetsuen souchi ni kansuru chousa houkokusho

Chihou tokusanhin ni kansuru chousa

Hogo seishounenkou ni kansuru tokubetsu chousa