- E-mail ： otsuka.ryoma@ist.
- Tel ： S4513
The four-digit phone numbers are extensions used inside Osaka University. The phone numbers from outside Osaka University are as follows: S: 06-6879-xxxx, S*: 06-6105-xxxx, T: 06-6850-xxxx, and S() and T(): 06-6879-5111 (via switch board).
The domain name “osaka-u.ac.jp” is omitted from e-mail addresses. Please add “osaka-u.ac.jp” to each e-mail address.