Clue 1: I am Japan's first orbital launch vehicle.
Clue 2: I stand 23.6 meters tall.
Clue 3: I was first launched in 1970.
Clue 4: My payload to low Earth orbit is 26 kg.
Clue 5: I am an all-solid propellant rocket.
Clue 6: I was developed by ISAS.
Clue 7: I launched the Ohsumi satellite.
Yes, I am Mu-4S.
I made Japan the fourth nation to launch a satellite.
