A random search for flights from Frankfurt (FRA) to Tokyo Narita (NRT) shows:
OPTION 1: 11hr 30min Nonstop
FRA - NRT Japan Airlines Flt 408 Dep 08:25pm 20Nov,Fri
Flight Duration: 11hr 30min
OPTION 2: 11hr 15min Nonstop
FRA - NRT ANA Flt 210 Dep 08:45pm 20Nov,Fri
Flight Duration: 11hr 15min
OPTION 3: 11hr 10min Nonstop
FRA - NRT Lufthansa Flt 710 Dep 01:35pm 20Nov,Fri
Flight Duration: 11hr 00min
OPTION 4: 14hr 10min via Beijing Capital (PEK) to Tokyo Haneda (HND) (Perhaps cheapest)
FRA - PEK Air China Flt 966 Dep 02:40pm 20Nov,Fri
PEK - HND Air China Flt 181 Dep 08:40am 21Nov,Sat
Flight Duration: 12hr 50min; Layover Time: 1hr 20min; Total Trip Time: 14hr 10min
It depends on where in Germany you want to fly to.
Why don't you fly there and find out
Depending on where in Germany, but about 11 hours.
about 18 hours
19 hours
It depends on where in Germany but it will take about 10 hours and 10 minutes.
33 seconds!
6 hours.
For ever
60 mins
20+ hours.
7 hours 25min