The present invention provides a tea-based fermentation beverage comprising a tea-based fermentation liquid with at least one species of lactic acid bacteria selected from the group consisting of Lactobacillus ONRIC b0239 (FERM BP-10064) and Lactobacillus ONRIC b0240 (FERM BP-10065), and a tea beverage comprising at least one species of lactic acid bacteria selected from the group consisting of Lactobacillus ONRIC b0239 (FERM BP-10064) and Lactobacillus ONRIC b0240 (FERM BP-10065).