Provenance Record

Well-structured News piece (709 words) using the Overview / What We Know / What We Don't Know / Analysis format. Clear separation between the current July 4 groundbreaking and the December 2025 prior reporting, with each figure attributed to a specific outlet.

All four source snapshots read from disk. source-0 (TrendForce, 2026-07-06) fully corroborates the ¥1.5 trillion (US$9.3B) figure, the July 4 groundbreaking, equipment delivery/installation in 2H2028, METI's up-to-¥500 billion subsidy pledge, the Hiroshima 1β DRAM / first-1γ-EUV role, HBM4 for NVIDIA Vera Rubin in mass production scaling 1β to 1γ, the 1γ 256GB DDR5 RDIMM qualification samples and 1γ 16Gb LPDDR5X mass production, the Mehrotra quote ('Micron's first-ever HBM production wafer was made right here in Hiroshima') verbatim, ~80% Japanese chip materials, the three-year fab timeline / oversupply concern, the 800-trillion-won Korea investment context, and the Samsung P4/P5 and SK hynix M15X/M17 details. source-2 (Data Center Dynamics, 2025-12-01) confirms the $9.6B original plan, $3.2B expected METI subsidy, May 2026 construction start, first HBM shipments from 2028, Nikkei's up-to-$5B total-subsidy estimate, the 2023 up-to-$3.6B EUV pledge, the May 2025 EUV machine deployment, and the 'catch up to SK Hynix' framing. source-3 (Data Center Dynamics, 2026-03-16) confirms HBM4 36GB 12H volume production for Vera Rubin at >2.8 TBps (2.3x HBM3E) and the HBM4 48GB 16H samples with 33% more capacity. source-1 (Yahoo Finance) resolved to a consent.yahoo.com privacy wall with no article content; it is only ever co-cited with TrendForce (for the 2H2028 equipment claim), so no load-bearing claim rests on it alone.

Every number, date, name, and quote traces to a cited snapshot. Headline and summary figures (¥1.5 trillion, ¥500 billion, Hiroshima, AI memory, 2H2028) all verified against TrendForce. Both internal cross-links (2026-03/22 HBM4 article and 2026-07/02 SK hynix Cheongju article) resolve to existing published articles.

High-quality, well-sourced News submission. All integrity checks pass, the signature is valid, every specific traces to a read source snapshot, and the Yahoo consent-wall source carries no unique load-bearing claim. Approved for publication.