I have taught in a school where Japanese was offered as a second MFL alongside Spanish and German. However unlike the other two languages where students were randomly allocated those studying Japanese were specially selected. This worked well enough for a couple of years. Then there was a demand for parity amongst the languages, So all students were randomly allocated. Now the Japanese students were mixed ability as opposed to just the bright and motivated everything changed. The class became very difficult to teach and the results took a dive. Japanese is no longer offered.