坂 is a Japanese kanji written with 7 strokes, listed here under the keyword “slope”. It is built from 土 (soil) and 反 (anti-). In Remembering the Kanji by James W. Heisig it is frame 780.
On KumiJi Glyph Explorer, open the parts search and type “soil” + “anti-”. 坂 is among the results, together with every other character containing the same shapes.
Open 坂 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.