This is the 5955th most frequent Japanese word.
りかん
"りかん" (理解ん) means "understanding" or "comprehension."
In this sentence, 'りかい' (理解) translates to 'understanding,' indicating comprehension of the company's ideology.
彼は会社の理念を完全に理解しています。
He completely understands the company's philosophy.
Here, 'りかい' (理解) refers to 'understanding' in the context of awareness or familiarity with the problem.
その問題についての理解が足りないと感じます。
I feel there's insufficient understanding regarding that issue.
In this case, 'りかい' (理解) is used to mean 'comprehension' in the context of grasping mathematical ideas.