↳ CAF WATCHER // CONTINUOUS PHYSICAL AUDIT LEDGER

SoftBank (SB Intuitions & Sovereign Japan AI) Grade B+

Masayoshi Son's multi-gigawatt sovereign AI supercluster buildout: 100k+ Blackwell GPUs and Hokkaido clean energy · Category: Sovereign AI & Megaprojects

Executive Physical Feasibility & Delivery Audit

Institutional Baseline: CAF Watcher evaluates stated accelerator capabilities against empirical physical reality (interconnection queues, electrical substations, liquid cooling heat transfer, and optical network fabrics). Missing public evidence is classified as unknown—it is never treated as zero capacity. Operator telemetry strengthens assessments, but participation is never mandatory.

CAF INTERVAL
[0.33 – 0.58]
DELIVERY GAP SCORE
48 pts
OPERATING POWER
0.61 GW
vs 0.63 GW announced
EVIDENCE CONFIDENCE
MEDIUM (65%)

Physical Coupling Pillars

Power & Grid Substrate (E): 82/100. Repurposing the Sharp Sakai LCD factory provides an immediate 150 MW high-voltage electrical substation already connected to Kansai Electric Power.
Thermal Dissipation & CDU Limits (T): 84/100. Hokkaido's cold climate (average annual temperature ~7°C) provides free cooling for most of the year, drastically reducing chiller compressor power draw.
Cluster Topology & Optical Fabric (N): 86/100. The former Sharp display factory features heavy reinforced concrete floors designed for multi-ton semiconductor lithography tools, easily supporting 3,100 lb NVL72 racks.
Silicon & Advanced Packaging (O): 85/100. SoftBank owns ~90% of Arm Holdings, giving them intimate architectural visibility into Grace CPU and next-generation sovereign silicon designs.

Attributable Public Evidence Ledger

Every claim evaluated by CAF Watcher is grounded in public regulatory filings, utility interconnection disclosures, environmental permitting reports, or peer-reviewed engineering papers.