We present a comparison of the SCUBA half degree extragalactic survey (SHADES) at 450 mu m, 850 mu m and 1100 mu m with deep guaranteed time 15 mu m AKARI FU-HYU survey data and Spitzer guaranteed time data at 3.6-24 mu m in the Lockman hole east. The AKARI data was analysed using bespoke software based in part on the drizzling and minimum-variance matched filtering developed for SHADES, and was cross-calibrated against ISO fluxes. Our stacking analyses find AKARI 15 mu m galaxies with greater than or similar to 200 mu Jy contribute > 10% of the 450 mu m background, but only < 4% of the 1100 mu m background, suggesting that different populations contribute at mm-wavelengths. We confirm our earlier result that the ultra-deep 450 mu m SCUBA-2 cosmology survey will be dominated by populations already detected by AKARI and Spitzer mid-infrared surveys. The superb mid-infrared wavelength coverage afforded by combining Spitzer and AKARI photometry is an excellent diagnostic of AGN contributions, and we find that (23-52)% of submm-selected galaxies have AGN bolometric fractions f(AGN) > 0.3.