A novel Gram-stain-positive rod-shaped actinobacterium was isolated from a soil conditioner made from poultry manure. The isolate, designated strain MN-6-a T , contained anteiso-C 15 : 0 and anteiso-C 17 : 0 as the major fatty acids, and MK-7(H 2 ) and MK-8(H 2 ) as the major menaquinones. Phosphatidylglycerol was a major polar lipid. The G+C content of the genomic DNA was 67.4 mol%. Phylogenetic analysis showed that strain MN-6-a T was closely related to et al., 2010). Here, we report the taxonomic study of a novel strain of the genus Brevibacterium obtained from a soil conditioner made from poultry manure in Japan.The soil conditioner was produced and kindly provided by Sakamoto Youkei Co., Ltd, a poultry farming company, located in Yomogida Village, Aomori Prefecture, Japan. Samples (1 g) of the soil conditioner were suspended in 9.0 ml of sterilized water and serially diluted 10-fold in water. Aliquots of diluents (1 ml) were mixed with 10 ml pre-melted isolation medium (45 u C) and poured onto sterilized plastic plates. The agar plates were incubated at 30 u C for 7 days. The isolation medium consisted of 0.025 % peptone, 0.05 % yeast extract, 0.05 % glucose, 0.003 % MgSO 4 . 7H 2 O, 0.00035 % CaCl 2 . 2H 2 O, 0.01 % cycloheximide and 1.5 % agar. Colonies formed on the plates were transferred to the same medium and then purified. Among the isolates, a Gram-stain-positive rod-shaped bacterium, designated strain MN-6-a T , was selected for the description as a novel species.TSA (Difco) was used for cultivation, maintenance and morphological studies unless otherwise stated. Cultivation was performed at 30 u C. Cell morphology was observed by optical microscopy (Olympus). The absence of flagella was confirmed by transmission electron microscopy (JEM2000EX; JEOL) as described previously (Kitamura et al., 2011). Growth was tested at various temperatures (4, 10, 15, 20, 25, 30, 37, 40 and 45 u C). The pH range for growth was determined using ISP 2 medium adjusted to pH between 5.0 and 11.0 in increments of pH 0.5. NaCl tolerance was determined using ISP 2 medium containing 0 %-20 % NaCl in increments of 1.0 %. Yeast Nitrogen Base (Difco) agar slants (pH 7.0) supplemented with 0.1 % yeast extract were used as the medium for the determination of growth substrates; separately sterilized substrates were added to the sterilized medium to final concentrations of 1.0 %, except sodium salts of organic acids (0.1 %), before making the slants. The DDBJ/EMBL/GenBank accession number for the 16S rRNA gene sequence of Brevibacterium yomogidense MN-6-a T is AB609748.