Toshiya Takeshi

• Jisuberichi ni okeru chōjaku no sōnyūshiki kōnai keishakei setchi oyobi keisoku tō ni kansuru nouhau
• Jushi koteihō ni yoru suberimen hyōhon no sakusei manyuaru (an)
• Kōnai keishakei dēta furyō no gen'in ni kansuru jittai chōsa to keisoku gijutsu no kaizen, kaihatsu