The non-volatile organic constituents of eight atmospheric fallout (wet plus dry fallout) samples from the Tokyo area were determined. Considerable amounts of total organic carbon were found, ranging from 3.1 to 25 mgCm −2 day −1. n-Alkanes were found in the ranges of carbon chain length from C 12 to C 40 in total amounts between 4.4 and 55 μg m −2 day −1, in addition to an even larger amount of unresolved complex mixed hydrocarbons. Fatty acids were detected between carbon chain lengths of C 8 and C 34, including unsaturated and branched acids. The total content of fatty acids ranged from 26 to 190 μg m −2 day −1. Furthermore, o-, m- and p-hydroxybenzoic, vanillic and p-coumaric acids were identified and the presence of syringic, ferulic and protocatechuic acids and bisphenol A were indicated. The amounts of phenolic acids and bisphenol A were each less than 4.7 /gmg m −2day −1. These organic constituents may influence the composition of organic matter in urban aquatic environments. The major sources of hydrocarbons are considered to be higher plants, and combustion products of fossil fuels. The fatty acids and phenolic acids may be derived from higher plants as well as domestic and industrial sources. Pollens may be a source of plant organic matter. However, loss of more volatile compounds might have occurred during evaporation before analysis.