<s>
Ninja	B-Application
Boy	I-Application
,	O
known	O
in	O
Japan	O
as	O
,	O
is	O
a	O
1990	B-Application
action	B-Application
video	I-Application
game	I-Application
that	O
was	O
developed	O
and	O
published	O
by	O
Culture	O
Brain	O
for	O
the	O
Game	B-Device
Boy	I-Device
.	O
</s>
<s>
Ninja	B-Application
Boy	I-Application
uses	O
the	O
gameplay	O
formula	O
of	O
Kung	B-Application
Fu	I-Application
Heroes	I-Application
.	O
</s>
