It's next to the famous house musical instrument store, which is what you are looking for.

The specific address is at Moziqiao, opposite Sichuan University.

You can take bus 12.

In other words, where is Ishikawa Conservatory of Music? Among many musical instruments, the most famous one is the Musical Instrument Store (Tel: 028-8544249 1 85436697 Address: No.33 Zhu, No.69 Qunzhong Road, Wuhou District, Chengdu).