藩 means feudal domain (han) and is a JLPT N1 kanji. It has 18 strokes and uses the grass / plants radical (艹).
Stroke order · 18 strokes
On'yomi (音読み)
ハン
Kun'yomi (訓読み)
—
Radical
艹 · grass / plants
Strokes
18
How to remember 藩
A domain enclosed by a grass fence (艹) — a han. There were over 260 such domains in the Edo period; 薩摩藩・長州藩 are words constantly used in historical dramas.