First results of the two-dimensionally reconstructed distribution of divertorradiation in JT-60U are presented. Hardware improvements of in-vessel divertorbolometer cameras to withstand severe electrical and thermal loads and thedevelopment of tomography software have made detailed and visual studies ofdivertor radiation possible. Line-integrated bolometer signals aresuccessfully mapped onto the JT-60U geometry, indicating characteristicprofiles for radiative divertor operation. A unique measurement of theradiating layer width at the target plate independently confirmsthe results of tomographic analysis. Radiation which is almost uniformlydistributed along the separatrix flux line from the inboard to the outboarddivertor is identified in the moderate density H-mode. Temporal evolution ofradiative collapse due to heavy argon radiation is explored. Difficulties inthe reconstruction associated with the local hot spot and neutrals are alsodiscussed.