Usa-shi Kyōiku Iinkai

• Ippan kokudō 10-gō Usa dōro kensetsu ni tomonau maizō bunkazai hakkutsu chōsa gaihō
• Ippan kokudō 10-gō Usa, Beppu dōro kensetsu ni tomonau maizō bunkazai hakkutsu chōsa gaihō
• Usa chiku isekigun hakkutsu chōsa gaihō