Japan. Rikugun. Shina Chūtongun. Otsu Shokutaku Kōgyōhan

• Hokushi bōseki, seifun kōgyō chōsa hōkoku
• Hokushi itagarasu, sōda kōgyō chōsa hōkoku
• Hokushi semento, sekiyu kōgyō chōsa hōkoku