Hi, I am Safi, HSAA Ambassador.
Although, Hiroshima International Airport is situated in Mihara, which is far from Hiroshima City, but the airport is easily accessible.
*Bus:
i) There is limousine bus service from airport to Hiroshima Station Shinkansen exit. It takes about 45 minutes. Cost: 1340¥
ii) Also, limousine bus service from airport to Hiroshima bus center. Cost: 1340¥
iii) There is also a bus service to the nearest JR station, Shiraichi, from the airport. Cost: 390¥
*Hiroshima University (HU), Higashihiroshima Campus:
i) You can request pickup service from the following website. Cost 1000¥
http://www.sumumu.com/user/hiroshima_univ/bus-e.html
ii) Also, you can take taxi. But cost is higher.
iii) You can take the bus to reach JR Shiraichi Station. After taking JR tain from Shiraichi, please get off in Saijo Station. You will get bus to Hiroshima University from right in front of the Saijo Station. Bus fare from Saijo Station to HU: 290¥
For further information, please refer to the following website