Japanese Nanniichuan Arc

The  is the 16th story arc covered in the Ranma ½ manga, spanning three chapters. This arc was included in volume 8 of the  and Volume 7 of the Viz Media tankōbon.

Plot Summary
Having learnt from Ryoga of a fabled Japanese Nannīchuan (spring of drowned man), Ryoga and Ranma follow the map's directions to the spring, only to discover that it is now underneath Furinkan High's female changing room.

Undeterred, Ranma attempts multiple schemes to infiltrate the locker room, with little success. Eventually Ranma engages in a fight Ryoga over his antics, ultimately resulting in what appears to be the spring erupting from beneath the locker room. Unfortunately for Ranma, he learns that the spring has since closed, leaving the janitor to deal with the water-pipe that Ranma broke.

Major Events

 * Ranma and Ryoga learn that the fabled Japanese Nanniichuan is no longer in service.

Changes in anime

 * In anime Ryoga never moves the fox statue.
 * Ranma's attempt to get in as a girl fails instantly.
 * Anime version of the arc extends to 3 episodes, but only episode 34 adapts the manga, other two are pure filler. Also, due to arcs being in different order in anime, both filler episodes has continuity nods to "Mousse Returns Arc", which takes place later in manga continuity.
 * Thus the urn Ranma finds in female changing room doesn't have a note but rather takes him for a long goose chase in two filler episodes, ending in the same reveal as anime version.

Characters Introduced

 * No characters debuted in this arc.