Ryuuta returns for a final summer at the restaurant where he's worked for years, prepared to end his one-sided love for the owner Nao. To his surprise, Nao is freshly single and heartbroken, but not prepared for a relationship. He is curious about Ryuuta's feelings, though, and they gradually start something new. Nao is 30.
A soba chef and a master of sake fall in love. The MC is 30+!
A 35yo man trying to escape his past meets someone 12 years his junior.
A lonely country boy bonds with a computer technician over moss balls.
The love interest is 31.
Multiple stories. The second is an older writer getting a second chance at love. He has a teenage son and is widowed, so I'm assuming he has to be past 30.
The gentle, sassy love story of an overworked government employee and his faithful subordinate. I'm pretty sure they're BOTH over 30!
Slice of life centered around food. Kenji and Shiro have chosen to stay together for life, even though their romance isn't fireworks. It's a quiet happiness. They are both in their 40s.
Twelve years ago, Nonokawa's elementary school was submerged in floodwaters and took with it the painful memories of his first love. When a drought causes the school to reappear, Nanokawa, on the brink of resigning from his city job, returns home on a whim and is reunited with Kouya, who will do anything to make him stay. Both of them are early 30s.
Love comes knocking when Kami's homecooked meal is eaten on live TV by the host of a popular show. Kami is early 30s.
Two men licking wounds from unrequited love are brought together over kittens and find stability in each other. Kiriya's age isn't specified, but he's an associate professor and his ex had been pressured to marry, so I assume he's at least 30 years old.
Umi To Futari No Enbun Noudo