At first, Daegaya exchanged with Geumgwangaya in Gimhae by utilizing the waterway of the Nakdonggang. After that, Daegaya made exchanges and trades with other external forces, including Wae, the name of ancient Japan.

A variety of relics, found in the Jisan-dong Mounded Tomb Group, enable us to assume its external exchange in those days. These include: lamps, bronze bowls with a cover, spindle cars, grindstones, and dippers made of noctilucent shell. Of these, much more attention was paid to the lamp and dipper.

The lamp found in Jisan-dong seems to originate from Baekje or China. This indicates that Daegaya was exchanging with these states between the fifth and sixth centuries. The dipper was made of the noctilucent shell which is found only in Okinawa, Japan.

It seems that the dipper, made in Japan, was imported to Daegaya and buried as a funerary object of the actor of the Jisan-dong Tumulus No. 44. This dipper has been noted as a representative relic which verifies the fact that trade between Daegaya and Japan was actively carried out in the mid- and late fifth century.