There are four rather specialised systems on the satellite:
SPAISE (SPace-based Automatic Identification SystEm) - test on-orbit a receiver for picking up signals from Automatic Identification System transmitters on ships well out to sea, and determine how space-based reception is affected by interference between nearby transmitters and by environmental conditions.
FOX (Flat heat-pipe on-orbit experiment) - to test whether flat heat pipes work in space in accordance with theoretical models and with tests on Earth
IST (In-flight experiment of Solar absorption rate with THERME) - to acquire information about the effect of sunlight in space on thermal coatings, re-flying the THERME instrument developed by CNES for testing different thermal coatings 
QCM (Quartz Crystal Microbalance) - to test whether a Japanese-manufactured quartz microbalance works well in monitoring contamination of the satellite from assembly to on-orbit operation.
^Krebs, Gunter. "SDS 4". Gunter's Space Page. Retrieved 31 October 2013.
^McDowell, Jonathan. "Launch Log". Jonathan's Space Page. Retrieved 31 October 2013.
^"SDS-4 Satellite details 2012-025C NORAD 38339". N2YO. 30 October 2013. Retrieved 31 October 2013.
^"Small Demonstration Satellite-4 (SDS-4)". JAXA. Retrieved 3 December 2019.
^"JAXA and SKY Perfect JSAT Conclude an Agreement on the Transfer of the Small Demonstration Satellite-4". JAXA. 24 April 2019. Retrieved 3 December 2019.
^"In-flight thermal coatings ageing on the THERME experiment" (PDF).
Payloads are separated by bullets ( · ), launches by pipes ( | ). Crewed flights are indicated in bold text. Uncatalogued launch failures are listed in italics. Payloads deployed from other spacecraft are denoted in (brackets).