Japanese television (NHK) has many TV shows that give instruction on all sorts of life-enriching, health strategies.
Let me give you more detail on this one.
The full instruction was to say the Japanese phonetic alphabet Ah, Ee, Uu, A, Oh, then Baaaaaaay (and the Baaay is where you stretch your tongue out.
And I think you can see that it works the different shapes of the mouth and tongue -- with the last part being probably the most important.
V K, I do this exercise at home when I'm on the Stairmaster machine -- same deal you're doing with the sit ups.
Let's be like Trump and TRiUMPh over old age!
Rest of family all got the usual wrinkles, so who knows....I used to do the facial exercises in the car with my kids in tow. Maybe freaked out some drivers...