Neutron radiography testing (NRT) has been applied to several ancient relics at Kyoto University Research Reactor and the cyclotron-based facility of Sumitomo Heavy Industries, Ltd. Some of the results are presented with comments on the usage and applicability of NRT. The objects studied are an excavated bronze mirror with four bell (late 5c.A.D. to early 6c.A.D.), an unearthed corroded bronze mirror with cloth (4c.A.D.), unearthed Buddhist sutras in a bronze case (10c.A.D.), a Tibetan unglazed Buddhist statue cushioned with cloth in a copper box with a window and an excavated iron sword conserved and restored (4-5c.A.D.). From comparisons with X-ray radiography testing, it has been found that NRT can well identify the stones located inside the bells and suggest the casting procedure. Moreover, NRT has been found to be remarkably effective for elucidating unobserved organic objects in bronze fine arts