Irving Resources discovers high-grade feeder at Omu Sinter

VANCOUVER, BC / ACCESS Newswire / June 25, 2026 / Irving Resources Inc. (CSE:IRV)(OTCQX:IRVRF)(FSE:1IR) (" Irving " or the " Company ") is pleased to announce receipt of strong assay results from newly discovered feeder style mineralization at its Omu Sinter epithermal gold-silver project located in Omu, Hokkaido, Japan. Diamond drill hole 26OMS-002, a 53m vertical hole drilled near the eastern margin of the sinter target earlier this year, intercepted 0.98 gpt Au and 68.96 gpt Ag (2.06 gpt AuEq) over 47.7m beginning at the top of bedrock and continuing to the end of the hole. Included within this intercept is a higher-grade subinterval grading 4.05 gpt Au and 54.71 gpt Ag over 7.0m with a further subinterval of 10.68 gpt Au and 187.81 gpt Ag over 1.05m .

Silver is notably elevated in this newly discovered zone. Results referred to in this news release are not necessarily representative of mineralization throughout the Omu Sinter project. This is the first instance of such high-grade mineralization being encountered in the shallow geologic environment at Omu Sinter.

Before hole 26OMS-002, no hydrothermal feeder was identified. Further exploration is strongly warranted in areas immediately adjacent to and below this drill hole. The Company is in the process of filing applications for an aggressive drill program to follow up on this important discovery.

In early 2026 , two shallow, vertical diamond drill holes, 26OMS-001 and 26OMS-002, were completed along the eastern fringe of Omu Sinter. In addition to the strong results from hole 26OMS-002 discussed above, hole 26OMS-001 intercepted a 22.18m interval of silica sinter grading 0.56 gpt Au and 10.36 gpt Ag (0.72 gpt AuEq). Full results from both holes are summarized in the table below.

A plan view and cross section are presented in Figures 1-3. Table summarizing gold- and silver-bearing sinter results: AuEq = Au + (Ag/64); recovery of both Au and Ag is