Near My Former Workplace

My husband and I are planning on traveling to Osaka, Japan in January. We haven't made reservation for hotel in Osaka yet, but I think I'll stay near my former workplace because I know a lot about the area. There are many good reasonable restaurants there. I'd like to have sushi, takoyaki, tonkatsu, yakitori, ramen, and ohagi. In addition, I'll meet my coworkers there. :) I will also enjoy sightseeing, shopping, and going to hair salon whose owner used to cut my hair. I can't wait going to Osaka!