Re: How to address a Shihan, Sempai, or Sensei?
To add to Joshua's earlier point about Japanese language. I often hear my colleagues; all sensei at a Japanese middle school, refer to their sempai as "sempai". I often hear them refer to each other as (name)sensei regardless of the persons position. I, for instance ,am often referred to as Chris Sensei. I have found though, that my coworkers generally only refer to each other as just "sensei" when addressing to a senior.