Natsuiro Mahjong © 1989 Video System.
Main CPU : (2x) Zilog Z80 (@ 6 Mhz)
Sound Chips : YM2413 (@ 3.579545 Mhz), OKI MSM5205 (@ 384 Khz)
Screen orientation : Horizontal
Video resolution : 352 x 240 pixels
Screen refresh : 60.00 Hz
Palette colors : 2048
Players : 1
The title of this game translates from Japanese as 'Mahjong Summer Job'.
Also released the same year as Mahjong Natsu Monogatari.