Which episodes of Sailor Moon Crystal are Ittou Asanuma in? I believe that Ittou Asanuma's first appearance in Sailor Moon Crystal is in episode 15 when Makoto introduces him to Usagi and friends, that he does not appear in episode 16, and that his famous scene with Makoto from the manga is in episode 17. Is he in any other episodes, or did he only appear in those two 2 episodes?
I do not recall Asanuma appearing in the first half of the show. It's of course possible he might have appeared earlier as a background object, similar to how the Curtis couple in Fullmetal Alchemist shows up in the background when Winry arrives in Central before they are formally introduced, but there are assuredly no explicit appearances up until episode 15. (If he did show up before then, it would be unsurprising for me -- as someone not that invested into Sailor Moon -- to have missed it, since I would not have known of Asanuma before episode 15.)

Thus:


Episodes 1-14: no explicit appearances
Episode 15: Makoto introduces Asanuma
Episode 16: no appearance except in the preview for 17.
Episode 17: Asanuma asks Makoto about her identity and tells her he wants to protect her.
Episode 18: Asanuma is briefly shown standing in front of a building right before the half-way mark, thinking of Makoto, and then at the fortune-telling meeting being brainwashed along with some other characters (Naru-chan, Sarashina from Rei's school).
Episode 19-25: no appearance: apart from two brief instances where Usagi and some of her friends return to the 20th century, these episodes are entirely set in the 30th century.
Episode 26: short appearance in a still towards the end, after characters return to earth.