# FUJITSU-MONAKA by Fujitsu Canonical page: https://technooptimist.io/computing/monaka Frontier: [Computing](https://technooptimist.io/computing.md) · Field: Data-center CPUs · Company: [Fujitsu](https://technooptimist.io/companies/fujitsu.md) Stage: Pilot (3 of 5: Research → Proto → Pilot → Deploy → Scaling) Updated: last update 2026-09-14, facts checked 2026-10-11 Goal: Build a Japanese-designed data-centre CPU that runs AI inference and everyday server work on far fewer servers and less power than rival chips, so power-limited sites can run AI without GPUs. Status: Evaluation samples shipping; global sales start November 2026, volume production in 2027. Next milestone: Global CPU and server sales begin, target Nov 2026 ## Milestones | Status | Milestone | Date | Slip | | --- | --- | --- | --- | | Done | Broadcom ships first stacked MONAKA samples | Feb 2026 | | | Done | Architecture detailed at Hot Chips 2026 | 24 Aug 2026 | | | Done | 144-core evaluation samples shipping to partners | Aug 2026 | | | Current | Global CPU and server sales begin | Nov 2026 | | | Planned | Server shipments start in Japan and Europe | Apr 2027 | | | Planned | Volume production | 2027 | | | Planned | MONAKA-X successor on 1.4nm | 2029 | | ## Upcoming events - **Nov 2026**: Global CPU and server sales begin - **2027**: Volume production - **Apr 2027**: Server shipments start in Japan and Europe - **2029**: MONAKA-X successor on 1.4nm ## Most important updates - **14 Sep 2026**: Fujitsu sets November 2026 global launch for the MONAKA CPU and a made-in-Japan MONAKA server. Fujitsu will start selling FUJITSU-MONAKA worldwide in November 2026, both as a standalone chip for cloud operators and server makers and inside its own MONAKA servers built at its Kasashima plant in Japan. ([our story](https://technooptimist.io/stories/fujitsu-sets-november-2026-global-launch-for-the-monaka-cpu-and-a-made-80e46f6a.md) · [original source](https://www.unite.ai/fujitsu-unveils-2nm-fujitsu-monaka-cpu-and-sovereign-ai-server/)) - **24 Aug 2026**: Fujitsu details MONAKA at Hot Chips: 144 Arm cores on 2nm dies stacked over 5nm cache, samples shipping. At Hot Chips 2026 Fujitsu laid out MONAKA's design: four 36-core dies on TSMC's 2nm N2P bonded onto 5nm SRAM dies, with a 5nm I/O die in the centre. ([our story](https://technooptimist.io/stories/fujitsu-details-monaka-at-hot-chips-144-arm-cores-on-2nm-dies-stacked-808c4cc4.md) · [original source](https://xenospectrum.com/en/fujitsu-monaka-stacked-chiplet/)) - **26 Feb 2026**: Broadcom ships first samples of Fujitsu's 144-core MONAKA CPU, built with its 3.5D chip-stacking platform. Broadcom revealed that Fujitsu's MONAKA server CPU is built on its 3.5D XDSiP platform, which bonds chips face to face for very fast die-to-die links, and that samples for Fujitsu shipped that week. ([our story](https://technooptimist.io/stories/broadcom-ships-first-samples-of-fujitsu-s-144-core-monaka-cpu-built-468c9ea2.md) · [original source](https://www.theregister.com/2026/02/27/fujitsu_taps_broadcom/)) ## Current obstacles - **Unproven performance claims**: The 2x AI inference and half-the-power figures are Fujitsu's own estimates; test conditions were not disclosed and no independent benchmarks exist yet. - **New stacking at volume**: MONAKA is among the first chips on Broadcom's 3.5D hybrid-bonded stacking; making such stacks reliably and cheaply in volume is still ahead. - **Winning buyers from AMD and Intel**: It competes with EPYC and Xeon; Fujitsu must convince cloud operators and server makers that have never bought its CPUs. ## Physics limits - **Memory bandwidth per core**: 144 cores share 12 DDR5 channels, about 500 GB/s in Fujitsu's own estimate, or roughly 3.5 GB/s per core. AI models that stream large weights run out of bandwidth before they run out of cores. - **The power wall**: Every transistor switch costs energy that becomes heat. At 350–500 W per chip, cooling, not transistor count, sets how fast all 144 cores can run at once. ## How it works ### Stacking: Cores stacked on cache Each 36-core 2nm die is bonded face to face onto a 5nm SRAM cache die with direct copper bonds, giving huge bandwidth over very short wires. ### Split nodes: Costly silicon only where it pays Only the cores use expensive 2nm silicon, under 30% of the chip's area. Cache, I/O and memory control stay on cheaper, mature 5nm. ### AI: Matrix and vector instructions SVE2 vector units plus new 8-bit (INT8, FP8) matrix instructions let the CPU run AI inference itself, without a separate accelerator. ### Security: Confidential computing Arm CCA encrypts data in memory and walls it off even from the operating system and hypervisor, so cloud tenants can share one machine safely. ## Spec sheet | Spec | FUJITSU-MONAKA | Provenance | | --- | --- | --- | | Cores | 144 (4 dies × 36) | reported | | Process | TSMC 2nm (N2P) cores; 5nm cache and I/O | reported | | Peak clock | 3.8 GHz | reported | | Memory | 12-channel DDR5, up to 8,800 MT/s | reported | | I/O | 96 lanes PCIe 6.0 / CXL 3.0 | reported | | Instruction set | Armv9 with SVE2 vectors | reported | | L2 cache per core | 512 KiB | reported | | Power (two versions) | 350 W air-cooled / 500 W liquid-cooled | reported | | AI throughput (INT8) | 69.7–96.2 TOPS (Fujitsu estimate) | estimated | | Double-precision matrix | 4.4–6.0 TFLOPS (Fujitsu estimate) | estimated | Provenance: reported = stated by the company; estimated = our estimate; sample = a sample figure. ## About Fujitsu Fujitsu, a Japanese technology company, collaborates with Japan's RIKEN research institute to develop superconducting quantum computers. The partnership aims for practical quantum computing with scalable architectures. - Fujitsu is a major Japanese IT services and technology company publicly traded on the Tokyo Stock Exchange. - Its RIKEN collaboration has developed 64-qubit (2023) and 256-qubit (2025) superconducting systems. - The partnership plans a 1,000-qubit system for 2026 and 10,000+ qubits by 2030. - Founded: 1935 - Headquarters: JP - Status: public - Staff: ~113,000 - Website: https://www.fujitsu.com - Partners, customers, investors: RIKEN (partner); Japan Ministry of Education (partner) Company page: https://technooptimist.io/companies/fujitsu.md ## Related programs More from Fujitsu: - [Superconducting Quantum Computer Roadmap](https://technooptimist.io/quantum/quantum-roadmap.md) (Pilot) Everything in Computing: https://technooptimist.io/computing.md --- The Techno Optimist tracks every frontier of technology, program by program: https://technooptimist.io/ (a Markdown version of any page: add .md to its URL; site map for agents: https://technooptimist.io/llms.txt). Data API (JSON, realtime stream): https://technooptimist.io/developers. People read 5 pages free, then Reader $10/month; these Markdown pages are open to agents.