Asahi beer`s only brewery is on Shikoku, The Saijo Asahi Brewery is located on the waterfront. There are shuttle buses that run from Iyo-Saijo station to the brewery. Information can be found on their website (http://www.asahibeer.co.j...).
On the road in front of the station are several Japanese style pubs. Also about a ten minute walk from the station is a street that has the majority of bars in Saijo. Making a left from the station onto Ekinishidori, cross the street and make a right onto the street directly after Iyokko ramen. About 3 blocks up this street are a string of pubs and bars, including the highly recommended World's End Cafe. The owner speaks a fair bit of English, and can make any drink you can think of if you can describe it to him. It also has a fair amount of imports and microbrewery beers, with Kirin on tap.