Glad you are enjoying Tsukimichi! The first season of the show in particular did a lot of trimming and rearranging of the source to better fit a seasonal anime structure. They basically cut out all of the other POVs (the other heroes) from the first season and moved it into the second season.

The other thing I have noticed is the anime has a lot more humor. There are lots of funny bits in the anime but the LN is more serious. I heard Eminence in the Shadow is similar, the LN, Manga and Anime have different tones.

The idea of "true names" is a very ancient one in mythology and literature. Based on the wiki page, it looks like it goes all the way back to Egyptian mythology. Off the top of my head, it is a feature in an epic like The Odyssey by Homer as well as a fairy tale like Rumpelstiltskin.

Yeah the Myths and Legends Podcast had an episode on Egyptian Mythology. If I remember correct Ra was the top god as he knew the true names so could bring them into existence.

Getting back to Reincarnated as a Slime, lots of people like to compare Tsukimichi and Slime. The two series bear a lot of similarities in their worldbuilding and mechanics (naming being one of them). Slime was published later, but adapted into anime first, but they do tend to draw inspiration from one another.

Yeah I they defiantly have similarities. Again not read the LN but the anime’s both have similar themes.