SOLUTION:
The people talking are the names of the actors who played the 6
Power
Rangers in the original movie. These are:
- Johnny -- Adam (Black Ranger)
- David -- Billy (Blue Ranger)
- Amy -- Kimberly Hart (Pink Ranger)
- Jason -- Tommy (White Ranger)
- Karan -- Aisha (Yellow Ranger)
- Steve -- Rocky (Red Ranger)
The long string of each yell should be broken into bigrams, and the
first letter converted into a number via the simple cipher A=1, B=2,
etc. This will yield a series of moves that are to be played in the
strategy game Go. This is clued by "200,000 yen" and "361" = 19^2,
the size of the Go board.
The moves, when applied to the appropriate board in order, and using
the rules of Go, will transform the meaningless image therein into a
sort of approximation of the letters "hOARSe." The solution word is
HOARSE.