C&R · IV · 133
Ho-155 Type 2 30mm aircraft cannon
Section IV: still an NFA firearm, also a curio or relic
Official wording
ATF P 5300.11 · APRIL 2025 EDITION · SECTION IV · VERBATIM · PDF P. 85 ↗
Japanese, cal. 30mm Browning Aircraft H0-155 Type 2, Machineguns/Cannons.
What this entry requires
- INFOATF states no date; production was about 1944–1945.
- INFOStill an NFA firearm; only registered examples transfer, with ATF approval (26 U.S.C. 5812, 5861).
Editorial facts · Our research
- Country
JapanBasis: the ATF wording - Manufacturer
- Nagoya Army Arsenal; Kokura Army ArsenalBasis: outside reference ¹
- Type
- MachinegunBasis: the ATF wording
- Action
- Select-fire / autoBasis: the ATF wording
- Caliber
- 30mmBasis: the ATF wording
- Made
- 1944–1945production; ATF states no dateBasis: outside reference ²
- Service
- Military
Source
- Official wording
- ATF P 5300.11, April 2025 edition · Section IV · PDF p. 85 ↗ · ATF original ↗
- Entries
- 1 line
- Verbatim check
- Checked against the PDF text before every release
- Editorial facts
- Confidence: Medium · Last revised 18 October 2026 (Evidence pass) · How we rate confidence
- References
- 1. Wikipedia, “ホ155-II” ↗, maker: infobox 設計・製造: 名古屋陸軍造兵廠; mass production at its Chikusa works; Kokura Army Arsenal's Itoyamaguchi works made 2 in August 1944 (ATF 'Type 2' read as the Ho-155-II)
- 2. Wikipedia, “ホ155-II” ↗, years: Ho-155-II mass production began August 1944 (798 in 1944); Nagoya arsenal records give 336 Ho-155 (I and II) made in 1945
- Fact tags
- ATF the ATF wording states it.
- REF ¹ an outside reference supports it; the number points to the list of references.
- ESTIMATE an approximate or indirect reading, for example the production range of the base model.
- NO CITATION we haven’t attached a reference for this fact; it’s our editorial reading, not ATF’s.
- Source checked
- 20 October 2026: ATF’s page still lists the April 2025 edition
- Corrections
- 1 change · see below
Correction history
- Evidence passMaker: Japanese Army arsenals → Nagoya Army Arsenal; Kokura Army Arsenal. Japanese Wikipedia (ホ155-II)
Historical context
NO VERIFIED IMAGE AVAILABLEWe show only freely licensed images verified to depict this model. None has been found yet.
Summary: Wikipedia, “Ho-155 cannon”. Text CC BY-SA 4.0. Retrieved October 2026.
FROM WIKIPEDIA
The 30 mm Ho-155 cannon was a Japanese aircraft autocannon used during World War II, often mistakenly called with the Ho-105 or Ho-151. A lighter and more compact Ho-155-II was designed towards the end of the war.