Kai Byoui Ramune

Both deliver life lesson and healing heart story of each episode Ramune has better ost, the bgm is the best 

Both series revolve around spiritual themes and consequences of wrong life actions.  

Both shows revolve around the main character having the ability to see "the supernatural" and their sensei guiding them. I do have to mention that there aren't any psychic powers in Kai Byoui Ramune as there are in Mob Psycho 100. Though Dr. Ramune doesn't have money on his mind while guiding their pupil. 

Both have a similar vibe concerning supernatural and the ability to see youkai or mysterious things. Both have good humour and similar supporting characters 

These two shows both deal with the supernatural mixing a modern world with the traditional Japanese style. In both we see a young man that, of necessity, becomes the assistant of a mysterious "doctor" who deals with strange cases using unconventional methods. The young man is then immersed in this new parallel reality where he meets all kinds of oddities. 

The aspect of "weird diseases" makes me think of monogatari. The episodes are showing various cases. Still, the atmosphere is different  

Very similar psychological themes focused around critically thinking to uncover latent problems and solutions. 

Both deals with Psychological sickness and help people 

This literally has the same feeling, I don't know why nobody has recommended this because even though these are different premises they are quite similar in themes. They both have some sort of psychological premise, mostly light-hearted comedy but sometimes they will give a more serious vibe. The art of both of these are kind of similar in a way.  

"Dr. Ramune: Mysterious Disease Specialist" is a captivating Japanese manga and anime series that seamlessly blends the supernatural and medical genres. The narrative follows Dr. Ramune, an enigmatic doctor with a knack for curing mysterious ailments that defy conventional medical explanations. Assisted by Kuro, the series unfolds as they encounter individuals afflicted with bizarre diseases, delving into the unknown to unearth the underlying causes. With a perfect balance of intrigue, emotion, and supernatural elements, "Dr. Ramune" offers a refreshing and unique take on the world of medicine, making it a must-watch for those seeking a captivating and unconventional storyline in the genre. 

both are mystery anime investigating supernatural phenomena kai byoui ramune is more casual mysterious disappearance is more dark 

Both MC are eccentric doctor  

Both are about people being punished and learning lessons from that supernatural punishment. 

Both talking mystical stories about their clients. In one anime main protagonists rent mystical items (tsukumogami) and in another they cure diseases by mystical items. By both they help other people and in both anime they learn stories behind characters life problems. 

Both deals with supernatural stuff and handed by mysterious MC. Meanwhile Jigoku Shoujo takes part with death, punishment and disgraceful events, Ramune is envolt with the mystics and, just like Jigoku shoujo, punishment comes along with the submission of a price when accepting the circumstances to solve some hardship, that being some weird manifestation or just human conflicts generated with the daily relationships. In short, both have prices while accepting a treatment (Ramune) or vengeance (Jigoku Shoujo). PS: another interesting thing about both is that you actually can start with whatever episode you feel like because the story of an episode is linear and, mostly, it doesn't takes sequel in the following episodes. With that in mind, I can say that the only recurring characters are the main cast and, on general, they didn't even mention the past events in the episode before the current one. Besides that, some episodes, at least in Jigoku Shoujo (mainly in the first season) try to take some notes to follow and, almost forcefully, to give a proper "ending" to the story/plot. The character Hajime (Jigoku Shoujo) for example, is an important key for this segment. read more 

Both are about healing "things" that a normal doctor can't heal. Something like emotions and inner wishes you can't tell others. MAybe a big diffrence will be, chocola maho is more "lolita" or "gothic" stily, while kai byoui ramune is more "traditonal" so far. 

Both series deal with helping people from the supernatural and both MC's are similar in some aspects  

Both supernatural shows that incorporate Japanese mythology and spirits Both deals with helping people from the supernatural Both MC's are similar in some aspects (mysterious , intelligent , lonely somehow, helpful , funny, do their work perfectly ..) Both deals with supernatural stuff (dark sometimes) Both has assistants (their bonds become stronger in every episode)