The TVTropes Trope Finder is where you can come to ask questions like "Do we have this one?" and "What's the trope about...?" Trying to rediscover a long lost show or other medium but need a little help? Head to Media Finder and try your luck there. Want to propose a new trope? You should be over at You Know, That Thing Where.
Stringy-Haired Ghost Girl (aka Onryo) for those two specifically; worth noting that they're in part derived from the Yuki-onna
For others, as always if you can find enough examples they could be added to the list either as one of the in-page listings or as their own page, no need for "yokai but less old" - Shinigami for instance are a modern addition to the lore that's already listed there.
Edited by Scorpion451
Youkai doesn't have anything on the specifically Japanese supernatural creatures that were invented in modern times (the kuchisake-onna and hasshaku-sama come to mind). Is there a page for them, or should there be a new one?