East Asian Department is the richest in view of plant collections and area.

40 % of live collection of the gardens is located in this department, which is explained with that fact that climate conditions of East Asia, in particular humid subtropics of Japan is almost analogical to our climate conditions.

The department is located on terraced area, occupying 6,05 ha. Larger area is represented with eastern exposition, whereas less with Northern and Western exposition. It borders with Himalayan, Mexican and Northern American Departments. The department was of the first departments established after foundation of the garden.

In 1913, with the support of Batumi Agricultural Community, the garden established contact with famous Japanese firms: Nursery Company and Seitaro Arai, granting the garden with 314 species of Japanese plants.

The relicts of the tropical flora of the third period is abundantly represented in the department: Ginkgo biloba, Metasequoia glyptostroboides; perennial grass – Japanese banana, large-leaved Fatsia papirifera, Pueraria, Actinide and others give a tropical appearance to the garden. Indian azalea, camellia, magnolia, pine-tree, Coturnix coturnix, Corylopsis, lindera, Juniperuc Sabina, various species of Rhododendron ponticum, Berberis vulgaris, decorative Japanese cherry, persimmon, maple, Enkianthus, Cryptomeria, aucuba are represented in abundance, preserving their red during the whole winter; bamboo plantations, chocolate tree, sweets tree, soap tree, grease tree, chestnut, oak, hortensia, Chinese sky grapes, red Myrica, Glyptostrobus pensilis, Taiwania cryptomerioides, Liquidambar formosana, Liriodendron chinense, Michelia compressa, Magnolia coco, Styrax obassia, Stewartia pseudo-camellia, Taxus mayrii, Tsuga sinensis, Alniphyllum fortunei, Illicium verum, Bischofia trifoliata, Milletia reticulata, Neolitsea sericea, Sinojackia xylocarpa, Fortunearia sinensis, Uncaria rhynchophylla, Thea sinensis, Cudrania tricuspidata, Paulownia tomentosa, Botrocarium controversum, Pterostyrax hyspida, Zelkova serrata, Larix leptolepis, Pseudolarix amabilis, Cinnamomum camphora, Chamaecyparis pizifera da obtusa, Podocarpus nagi, Castanopsis cuspidata, Buxus japonica, Lagerstroemia indica, Torreya nucifera, Sciadopitys verticillata, Trachycarpus fortunei, Pistacia chinensis, Gleditshia japonica, Melia azedarach, Euscaphys japonica, Jasminum humile, Chaenomeles japonica, Aleurites fordii, Ficus pumila, Zantoxylum schinifolium, Albizia kalkora, Trochodendron aralioides.

According to the list of International Union for Conservation of Nature (IUCN), out of critical species in danger of extinction, 62 species are conserved in the department, consisting of 20 families and 37 sub-families

According to the data of April 2012, collection of garden was represented with 710 species of 257 sub-families of 92 families. The department also contains landscape gardens of Japanese style.