“No results” are a part of the Japanese rules, but it technically requires both players to agree that it is a no result, which players should only agree to if it is due to something like a triple ko (or other balanced cycle).
In unbalanced cycles (like sending two, returning one) the player with the advantage could agree to end the game with no result, but strategically, they should not, and eventually break the cycle.
There are yet other cases, like double ko seki, where one player (maybe the one in a losing position and trying to waste time) could force the game to cycle, but the other player should not accept the no result.