http://home.a02.itscom.net/msx_lab/column/kyouiku/kyouiku.htm
It's an educational serie.
The mysterious number 4 could be Hyper Sports 1.
1 : Geography (Antarctic Adventure)
2 : Physical Education (Athletic Land)
3 : Arythmetics (Monkey's Academy)
5 : Society (Comic Bakery)
Science (Hyper sports and Hyper olympics series) was planned but never released in the "I Love" serie.
interesting interviews (in Japanese) are here :
http://www.geocities.jp/bgrtype/gsl/words/konamiantiquemsx1/...
Series 4 "Jolly Hopper" - Education is not actually educational series / "Science I love" was released as a "Hyper Sports 1".
Wow, thank you all! Excellent find. So it was a spring project to make some educational software. Hypersports 1 was the sport educational title that for some reason did not get the No 4 printed...probably because they where creating a sequel at the time and gave it a No1.
I guess I can stop my search for the missing No. 4 :-)
