I suppose these are a bit of stereotypical symbols of Japan, but it still looks cool I guess. Nice sword, I added the colour while synthesizing this clipart. Seems to make the image more balanced, I guess.
武士劍和櫻花
cherry blossoms、decorative、Japan、Japanese、katana、sakura、samurai、sword、symbol
櫻花、裝飾、日本、日本、武士刀、櫻花、武士、劍、符號
資料來源：openclipart ( https://openclipart.org/ )