01 / Shitosaka Pass
The pass road was renewed in Meiji 20,and the old tunnel was built in Showa 9.

A village survey found that the Nishiawakura side of the national historic site Chizu Ourai Shitosaka Toge-goe (智頭往来 志戸坂峠越) is a road rebuilt as a national highway in 1885–87. The work took about 1 year 8 months; a monument near the summit commemorates it. The old tunnel was built in 1934.
- National Historic Site: Chizu Ourai Shitosaka Toge-goe
- Work took about 1 year 8 months
- Old tunnel built in 1934
