Japan. Hokkaidō Kaihatsukyoku. Kaihatsu Keikakuka

• Heisei 10-nen enchō Hokkaidō sangyō renkanhyō
• Heisei 17-nen Hokkaidōnai chiikikan sangyō renkanhyō
• Heisei 7-nen Hokkaidō sangyō renkanhyō
• Sangyō kōzō chōsa (Heisei 2-nendo)
• Shihon keisei chōsa
• Shihon keisei chōsa
• Shōwa 63-nen enchō Hokkaidō sangyō renkanhyō