A Detective Puzzle! Solve at your own will~ Puzzle 2

            Hm...Vongola mansion eh? Let's wait until tomorrow. The next day, I waited till 8 PM to set off to the Vongola mansion. It took me a one hour trip to ride there in my Volkswagen, my slow baby. She's an old car, 20 years in the making. Anyway, as we arrived in the Vongola Mansion, I prepared my gun and but it into a secret pocket inside my coat.

        You see, the Vongola familigia were known as a famous mafia group, and quite powerful at that. I was just preparing my weapon for self-defense. As I walked up to the steel gates, I saw a code machinery besides it, and on it, settled a note. The note reads as below:

" Kufufu~ It seems you have done as told if you are reading this note, detective Yume...but can you solve the Vongola Code? If you speak in the land where the sun rises east, surely you can solve the code; Tsuna, Yama , Hiba , Shouichi. That's the code of the Vongolas." 

Code of the Vongola? Where sun rises east? Surely the answer can't be as simple as that. hmn.....

[ This one can be quite hard because you will need to know another language, but here is a clue. The numbering system uses TWO number system, and you will need to know both old and new counting system. Good Luck~

Update: Someone has solved the code!  It is 27801851~ This one was quite difficult actually, but you solved it! Great job! Look forward for the third puzzle ;) ]