[4] She also performed on B-sides, including a 2012 acoustic duet with Mai Shiraishi, titled "Shibuya Blues", on Nogizaka46's fifth single "Seifuku no Mannequin".

[10] Takayama made her literary debut in January 2016 with the short story Carry-over (キャリーオーバー), which was published on the website of Japanese magazine Da Vinci and illustrated by fellow Nogizaka46 member Mai Fukagawa.

[11] The next year she worked with Japanese investor Taizen Okuyama to learn about investing and track her own progress as an investor, which she and Okuyama then wrote about in a book published by PHP titled Investment Methods that Keep My Money Growing Even Though I'm An Idol (お金がずっと増え続ける投資のメソッド: アイドルのわたしでも, Okane ga Zutto Fuetsuzukeru Tōshi no Mesoddo: Aidoru no Watashi demo).

[23][24] A year after leaving the group, she joined the cast of the 2023 NHK series Chou Ningen Yousai Hiroshi Senki (lit.

[25] In July 2024, Takayama announced her marriage to Ken Fukura [ja], a quiz writer and video producer for QuizKnock who works under the name FukuraP.