Stickers are not just decorative. In Japan, there are rules. Placing a sticker that obscures your view is illegal. Stickers on the windshield must be below the AS1 line. Reflective stickers can also attract police attention. Keep your 本田 技研 工業 ステッカー on the rear window, bumper, or quarter panel to stay safe.
Culturally, sticker placement matters in the JDM scene. A Mugen sticker on a non-Mugen car is seen as poseur behavior. Enthusiasts respect authenticity. If you put a Type R sticker on a base model Civic, expect to be called out. The community values honesty.