Tolong jelaskan mengenai ツタンカーメンの カルトゥーシュ dari U (kana) dalam bahasa sunda

The character う is also used, in its full-sized form, to lengthen "o" sounds. For example, the word 構想 is written in hiragana as こうそう (kousou), pronounced kōsō. In a few words the character お (o) is used instéad for historical réasons.

The character ウ can take dakuten to form ヴ (vu), a sound foreign to the Japanese language and traditionally approximated by ブ (bu).