Gasu jigyou shuukin zadankai : dai 3kai eigyou bukai kenkyuu zadankai

Soukohin oyobi gasu mētoru seiri zadankai : dai 6kai gijutsu eigyou ryou bukai kenkyuu zadankai

Kanjougai gasu ni tsukite no zadankai

Boufu mokuzai kenkyuu zadankai kiroku

Sekiyu sekitan gasu ni kansuru kenkyuu

Shakai jigyou kenkyuu

Toukyou tosei o kataru : toseian kenkyuu zadankai sokki

Jigyou kaisha keiei kouritsu no kenkyuu

Jigyou kaisha keiei kouritsu no kenkyuu

Denki kyoukai kansai shibu dai 18kai bukai soukai gijiroku : fu dai 10kai denki jigyou juugyouin hyoushoushiki kiji

Hijouji roudou taisaku : dai 2kai zadankai houkoku

Toukyou gasu kabushiki gaisha jigyou enkaku no gaiyou

Kansai shibu dai 14kai teiji soukai narabini bukai soukai gijiroku dou dai 7kai denki jigyou juugyouin hyoushoushiki kiji

Jidou kouunki ni kansuru kenkyuu : shiyousha zadankai sokkiroku

Shakai jigyou kenkyuu shiryou

Shakai jigyou kenkyuu shiryou

Gasu jigyou torishimari ni kansuru fukenrei oyobi jigyou keiei ni kansuru kyoka jouken

Eigyou mujin no tokushusei kenkyuu : mujin gaisha keieiron no chuukaku

Kyouiku kenkyuu doushikai jigyou gaiyou

Doboku jigyou jikyoku taisaku : zadankai to daiissen no houfu

Nichiro seneki zai ryojun douyaku sankasha dai 2kai zadankai shi

Toukyou chihou kinrou kyougikai juuyou jigyoujou roumu kanri kenkyuu bukai youran

Denki kyoukai kansai shibu dai 19kai bukai soukai gijiroku dai 1ji shina jihen senbotsusha ireisai kiji dai 11kai denki jigyou juugyouin hyoushoushiki kiji

Kouzan hoan jitsugi shiryou : dai 3kai saikou kenkyuukai teishutsu shiryou

Kokushika no kenkyuu : dai 14kai gunmaken shotou kyouiku kenkyuukai