The is a subway line in Nagoya, Japan, part of the Nagoya Municipal Subway system. It is a loop line that runs from Kanayama, via Sakae, à Âzone, Nagoya Daigaku, and back to Kanayama, all within Nagoya. The Meijà  Line's color on maps is wisteria purple and stations are labeled with the prefix "M". Officially, the line consists of the , the western part, and , the eastern part. All stations accept manaca, a rechargeable contactless smart card, and other major Japanese IC cards.
The Meijà  Line, upon its completion, became the second loop subway line built in Japan, after the Toei à Âedo Line. The à Âedo Line, however, is not a true loop line as it is operated like a figure 6, with trains from the western Hikarigaoka terminus running anticlockwise around the loop and terminating at Tochà Âmae, returning around the loop to Hikarigaoka. Thus the Meijà  Line is the first (and currently only) true subway loop line in the country. The line is longer than the JR à Âsaka Loop Line (), but shorter than the JR Yamanote Line (). It takes 48 minutes to complete the loop.
The name Meijà  is derived from the abbreviated kanji of .
The acts as a branch line from the Meijà  line, with roughly every other anticlockwise train running toward Nagoyakà  instead of Nagoya Daigaku. The Meikà  Line's color on maps is a stripe of wisteria purple and white, and stations are labeled with the prefix "E". Officially, the line is part of Nagoya City Rapid Railway Line 2. The line provides through service to the Meijà  Line.
The line was originally part of the Meijà  Line. When the eastern part ("Line 4") of the current loop line was completed in 2004, the entire loop was renamed the Meijà  Line, with the remaining section (between Kanayama and Nagoyakà Â, outside the loop) being renamed to the Meikà  Line.
The name Meikà  is derived from the abbreviated kanji of .
The first section of Line 2, between Sakae-machi (now named Sakae) and Shiyakusho (now named Nagoyajo), opened in 1965. The line was named the Meijà  Line in 1969, and the extension was completed in 1971. Line 4 opened its first section between Aratama-bashi and Kanayama in 1974. The extension project was completed in 2004, making a loop line together with Line 2.
Women-only cars were introduced on the line on 4 July 2016, operating in the mornings until 09:00.