Both ....

-are classic timeless dorama
-are terminal disease human drama with somewhat heartwarming; hopeful; and very beautiful ending
-have great and very natural overall onscreen chemistry
-have a mesmerizing (visual-wise and acting-wise) j-actress in her prime as main lady
-have a list of extremely talented casts
-have a nice OST

Yeah, they are completely different genre. Arifureta is romance/ slice of life/ human drama/ family; and Date is more comedy/ romance/ family; but they do have some similar traits:

-main couple have somewhat scarred soul/ unusual conditions; and in dorama we'll be showed how they overcome their problems and grow together as a person and couple
-the family somewhat meddle their relationship
-both dorama have multilayering message and unique aura
-both have some fun; absurd, and wtf moments :XD:

both have a flawed hero; dark; have big portion of crime/ investigation /mystery plot; and have a shocking twisted ending....

Both have ....

-same writer
-Kurashina Kana <3
-some suspense plots
-(very) depressing tone in the start of series, but gradually become more hopeful
-somewhat unique and beautiful ending

-Both about a cofee-ya master who helps their customers to solve their problems.
-Both cofee-ya master have somewhat a bitter/dark past
-Both have a sentimental feeling lingering with the coffee smell ...
-Both have one or two cute eye candies :p

Yasashii Jikan is more like a healing - slow pacing - slice of life - nature scenery drama; and Kohiya is a more normal type.

Manhattan Love Story is simply a wackier; more absurd; crazier version of Love Shuffle :XD: (Of course in a good way)

Same writer; male leads starting as a big loser and have character developments to be a better and stronger person.

Main couples in these two drama start their love and chemistry in the same way: bickering with each other :XD:

Well, honestly I like Osozaki better :)

You like Buzzer Beat? Well, let me show you the best romance/sport jdorama: Pride :)

Pride is a classic and halu-aki onscreen couple chemistry is arguably the best ever in jdorama world.

These two are short slow paced- beautifully written - slice of life dramas who focus on female leads and their way to renew their life. They have the same relaxing, nostalgic, instropective, a little bit sentimental aura.

Yeah, Shining Inheritance, I mean it :XD: Your eye doesnt fool you.

-Same gorgeous Han Hyo Joo with same pure-nearly goddess character
-Same cinderella - like story
-Same Bae Soo Bin with the same typecast/role
-These two make huge success in Korea and paving the Han Hyo Joo's way to stardom

Both ...

-have a quirky - weird - not believe in love/marriage lead characters
-have Ryoko Kuninaka as supporting character
-are offbeat but highly introspective romcoms: you laugh and entertained, but in the same time you will learn about something

Asadoras; seaside environment; bubbly-cute-free spirited heroines who struggling to find life goal; and some fun dialects from rural Japan.