琉 is a Japanese kanji written with 11 strokes, listed here under the keyword “lapis lazuli”. It is built from 㐬 (lifebelt) and 王 (king). In Remembering the Kanji by James W. Heisig it is frame 2611.
On KumiJi Glyph Explorer, open the parts search and type “lifebelt” + “king”. 琉 is among the results, together with every other character containing the same shapes.
Open 琉 in the interactive kanji search
to expand every part down to its smallest pieces, add your own names and mnemonic stories,
or search for other characters by their parts.