They are really, really sorry about the construction

Signs that say "Sorry for the trouble caused by the construction" are pretty common in Japan. They usually include a mix of pre-printed and handwritten info about exactly what is being built and how long it will take, and a cartoon of a construction worker standing with shovel in hand, head bowed, often caps it off.
This construction site in Roppongi took the apology sign to the next level with a cartoon worker doing dogeza, a deep, solemn bow formerly common and now mostly reserved for the most serious of offenses. The text is straightforward (no jokey "pardon our dust!" tone), but I imagine the image is meant to be humorous. Er, right? Sometimes it's hard to tell.
Speaking of apologetic bowing and hard to tell, this oldie but goody is one of the subtly hilarious videos from the series "The Japanese Tradition." Not too long ago, a website with a famous truthy name posted this as if it were a helpful cultural guide. I think the editor should try one of the last few bows in the video for that one. Please enjoy. But don't go doing the ninja bow the next time you're late for work.