17 strokes
                                                    
                        Jouyou kanji
            Taught in 11th grade
    
                                            key
Kun'yomi
- か - ぎ - key ②lock ③key (to a problem, success, etc.) 
On'yomi
- ケ - ン - key (on a piano, organ, etc.) 
Character Breakdown
key
かぎ ケン (11th)
gold
キン きむ かね (1st, N5)
References
| Unicode hex code | 9375 | 
| JIS X 0208 | 1-24-16 | 
| Nelson, A. Classic Nelson | 4894 | 
| Haig, J. New Nelson Japanese-English Character Dictionary | 6317 | 
| Halpern, J. New Japanese-English Character Dictionary | 1753 | 
| Halpern, J. Kodansha Kanji Dictionary | 2203 | 
| Halpern, J. Kanji Learners Dictionary (Kodansha), 2nd edition (2013) | 1565 | 
| Heisig, J. Remembering The Kanji | 2761 | 
| Heisig, J. Remembering The Kanji, Sixth Ed. | 418 | 
| Gakken A New Dictionary of Kanji Usage | 1824 | 
| O'Neill, P.G. Japanese Names | 2652 | 
| Morohashi Daikanwajiten | 40654 | 
| Spahn and Hadamitzky Kanji and Kana (2011 edition) | 915 | 
| Tuttle Dictionary Descriptor Code | 8a8.18 | 
| Four corner code | 8514.0 |