もさることながら
(Mo saru koto nagara)
not to mention / while X is also (true).
Connection rules
- +Noun + もさることながら.
- +'Not only X but especially Y' — formal balanced comparison.
- +More literary / elevated than 〜だけでなく or 〜ばかりでなく.
Examples
1.
味もさることながら、雰囲気も素晴らしい。

Aji mo saru koto nagara, fun'iki mo subarashii.
The flavor is excellent, and so is the atmosphere.
「not to mention / while X is also (true)」
2.
実力もさることながら、努力も素晴らしい。

Jitsuryoku mo saru koto nagara, doryoku mo subarashii.
His ability is notable, and so is his effort.
「not to mention / while X is also (true)」
Practice
Not to mention the design, this car is also superior in terms of safety.
この車は___、安全性においても優れている。
Romaji also accepted