Time Out says
Found near the entrance to Omoide Yokocho ('memory lane') on the Seibu station side, this counter-only Chinese eatery serves cheap food and drinks from early morning to late at night. Try the egg-and-mushroom stir fry.
1-2-1 Nishi-Shinjuku, Shinjuku-ku
|Transport:||Shinjuku Station, west exit|
|Opening hours:||Mon-Wed, Sat, Sun 9am-1am; Thu, Fri 9am-2am|