Mister Hiroshi Tachibana, aka tcbnhrs on Youtube, is primarily a Shakuhachi player, but had became a nose flute fan and experimenter. This Summer, Hiroshi went again on Mont Fuji to record videos.
Here is one - a Janis Joplin "Summertime" cover. About it, Mr. Tachibana wrote: I've copied the singing of Janis Joplin by effective use of portamento. I think, portamento is an excellent method that should be further utilized in the nose flute.
You can watch the two other videos here and here.