Hamamatsu Photonics
6965.TMEDIUMDetection / Photon Counting · Weight: 10%· Data as of 2026-05-13
Investment Thesis
Sole Western-aligned supplier of 20-inch R12860 PMTs for Hyper-Kamiokande (20,000 units, data start 2028). ~40% global PMT share in a 3-player oligopoly. SiPM/MPPC strong position in automotive LiDAR (905 nm) and PET-TOF. Scientific cameras (ORCA-Quest) DOMINANT in low-volume sCMOS. NKT Photonics acquisition (€247M, June 2024) building quantum-tech end-stack (Koheras laser + ORCA camera). FY25 OI -29% YoY is largely the NKT integration burn (¥4.37B Laser segment loss) — one-time, not core deterioration. Trough EPS × peak PE = right-side-of-trough setup.
Risk
Concept-stock exposure to silicon photonics / CPO narrative — Hamamatsu is a 'niche player' per IDTechEx, not a CPO winner. Sony Semiconductor IMX479 stacked SPAD (June 2025) is first credible CMOS-process challenger to MPPC LiDAR moat. Siemens Biograph Vision PET-CT vertically insourced SiPM detector (per JNM 2019) — PET-TOF TAM smaller than headline. Q2 FY26 earnings 2026-05-14 is the binary validator.
Monitoring Trigger
If Q2 FY2026 (2026-05-14) shows Laser segment OI loss narrowing below ¥3B AND Opto-Semi YoY OI flat-to-positive, upgrade to HIGH. If Sony IMX479 disclosed in any tier-1 ADAS LiDAR teardown (Mercedes EQS Drive Pilot, BMW iX5, Volvo EX90), trim Opto-Semi thesis 30-50%. RSNA 2026 (Nov-Dec) watch for Canon/GE in-house SiPM announcements mirroring Siemens.
Key Dates
Key Metrics
Business Segments
| Segment | Revenue | Share | Description |
|---|---|---|---|
| Electron Tube (PMTs) | ¥71.9B | 34% | PMTs for particle physics, medical imaging, security. 26.4% OPM (highest in group). |
| Opto-Semiconductor (SiPM/SPAD) | ¥79.5B | 37% | SiPM/MPPC arrays for LiDAR, PET-TOF medical, scientific. 15.8% OPM, -30% YoY. |
| Imaging & Measurement | ¥32.7B | 15% | Scientific cameras (ORCA-Quest, ORCA-Fusion) for microscopy and quantum readout. |
| Laser (post-NKT) | ¥22.3B | 10% | Fiber lasers, photonic crystal fiber (NKT acquired June 2024 €247M). FY25 OI -¥4.37B integration burn. |
| Other | ¥5.7B | 3% | Various |
Supply Chain Evidence
| Evidence | Customer | Product | Detail |
|---|---|---|---|
| confirmed | Hyper-Kamiokande (ICRR / KEK) | R12860 20-inch PMTs (inner detector) | 20,000 units for inner detector + multi-PMT outer modules. Construction 2020-2028; main cavern excavation completed 2025-07-31; data taking 2028.[source](2025-07) |
| confirmed | Super-Kamiokande (ICRR) | R3600-05 20-inch PMTs | 11,200 units installed; long-running primary client since 1996.[source](1996) |
| confirmed | JUNO (IHEP China) | R12860 20-inch PMTs | ~5,000 Hamamatsu PMTs + ~15,000 NNVT MCP-PMTs. JUNO came online August 2025.[source](2025-08) |
| confirmed | Quantum Machines | ORCA-Quest qCMOS camera + NKT Koheras laser stack for trapped-ion / cold-atom qubits | Joint solution for quantum control & readout.[source](2024) |
| confirmed | Siemens Healthineers | Whole-slide digital pathology scanners (distribution) | 2023 distribution agreement for clinical pathology — note: pathology, NOT PET (Siemens vertically insourced Biograph Vision SiPM detector).[source](2023) |
| confirmed | NKT Photonics (acquired) | Photonic crystal fiber + Koheras DFB fiber lasers | Acquired June 2024 for €247M. Forms Laser segment backbone.[source](2024-06) |
Sources & References
Peer Comparison
| Company | PE | Fwd PE | ROE | Op Margin | FCF |
|---|---|---|---|---|---|
| Hamamatsu Photonics | 50.4 | 42.5 | N/A | 17.8% | N/A |
| Lasertec Corporation | 44.1 | 41.1 | N/A | N/A | N/A |
| USHIO INC. | 59.6 | 29.6 | N/A | N/A | N/A |
| Fujikura | 87.7 | 84.2 | 24.4% | N/A | N/A |
| Furukawa Electric | 65.7 | 65.8 | N/A | N/A | N/A |
| Sumitomo Electric Industries | 34 | 23.9 | N/A | N/A | N/A |
| HORIBA | 27.5 | 23.7 | N/A | N/A | N/A |
| Mitsubishi Electric | 32.5 | 27.5 | N/A | N/A | N/A |
| Anritsu Corporation | 45.4 | 37.5 | N/A | N/A | N/A |
| NTT, Inc. | 11.9 | 11.6 | N/A | N/A | N/A |
| Fujitsu Limited | 18.9 | 19 | N/A | N/A | N/A |
| NEC Corporation | 19.95 | 18.2 | N/A | N/A | N/A |
| DISCO Corporation | 56 | 42.6 | N/A | N/A | N/A |
| TOWA Corporation | 45.2 | 24 | N/A | N/A | N/A |