The Japan and Asia sites make no mention of it. Several owners seemed to confirm it is not STN in another thread. Appears not to be STN in photos from owners. Also, the description in these links say "The GMWB5000BC-1B incorporates a super illuminator LED light and solar battery – rendering it capable of self-charging, as well as a special STN LCD." The watch is mislabeled as GMWB5000BC-1B when it should be GWB5600BC-1B. First part of the sentence is obviously wrong. I imagine the last part could be wrong too if the copywriter is thinking of and researching this as a GMW-B5000 model.