Dragon Gate Summer Adventure Tag League 2015 - Night 4 was a Professional wrestling event produced by Dragon Gate, which took place on September 11, 2015 at the Kasukabe Fuerai Cube in Kasukabe, Saitama, Japan.
- Numbers in parentheses indicate the length of the match.
- (c) refers to the champion(s) heading into the match.
- Naruki Doi & Shingo Takagi defeat Jimmyz (Genki Horiguchi HAGeeMee & Jimmy Susumu) (11:06)
- Takehiro Yamamura defeats Kaito Ishida (4:56)
- T-Hawk defeats Cyber Kong (10:05)
- Dia.HEARTS (Big R Shimizu & Masaaki Mochizuki) defeat Eita & YAMATO (13:42)
- Dia.HEARTS (BxB Hulk, Dragon Kid & Kzy) defeat Flamita, Gamma & Takehiro Yamamura (12:57)
- Don Fujii & Ryo Jimmy Saito  vs. Monster Express (Akira Tozawa & Masato Yoshino)  - Time Limit Draw (20:00) in a Summer Adventure Tag League 2015 Block B Match