In addition to other answers, note that bridge=* can have more detailed values then yes. In this particular case, it is even smaller than bridge=boardwalk, so maybe something like bridge=simple_brunnel (according to its picture at least; I have no idea what “simple brunnel” means - would someone like to improve that wiki page? 
) ? There is also close (but yet undocumented) bridge=log_bridge.
Or better yet invent & document new value if someone can suggest good English name (“shako” means something completely different in English) - this certainly looks like a case that is much rarer in western-european which has (so far) been predominant in inventing tags.
(While you can also use man_made=bridge for bridge outline and its additional attributes like bridge:structure=* or bridge:support=*, I personally probably wouldn’t bother, unless I were really interested in bridges).