はもとより

はもとより is a formal expression used to emphasize that the thing that follows is true even more strongly or widely than what precedes. It starts from a baseline assertion with はもとより, then adds something that is even more obvious, important, or expected. It is common in written or formal speech, but can also appear in careful spoken language. It is not about literal order but about hierarchy of importance or inevitability. In everyday conversation, it often replaces simpler phrases like もちろん or もちろん〜も, giving a stronger tone.