National Route 21
国道21号
Route information
Length	101.4 km[1] (63.0 mi)
Existed	4 December 1952–present
Major junctions
East end	National Route 19 in Mizunami
West end	National Route 8 in Maibara
Location
Country	Japan
Highway system
National highways of Japan Expressways of Japan
← National Route 20 → National Route 22

National Route 21 (国道21号, Kokudō Nijūichi-gō) is a national highway connecting Mizunami, Gifu Prefecture and Maibara, Shiga Prefecture in Japan.^[2]

Route data

• Length: 101.4 kilometers (63.0 mi)
• Origin: Mizunami (originates at junction with Route 19)
• Terminus: Maibara (ends at Junction with Route 8)
• Major cities: Minokamo, Kakamigahara, Gifu, Ōgaki

History

• 4 December 1952 - Designation as First Class National Highway 21 (from Mizunami to Maibara)
• 1 April 1965 - Designation as General National Highway 21 (from Mizunami to Maibara)

Intersects with

• Gifu Prefecture
  • Route 19
  • Route 248
  • Route 41
  • Routes 22 and 156
  • Route 157
  • Routes 258 and 417
  • Route 365
• Shiga Prefecture
  • Route 8