Japan's New Patrol Ships 'Hinoki' and 'Sugi' Spark Naval Pride and Pollen Panic

On March 13, 2026, the third and fourth vessels of the Japan Maritime Self-Defense Force's new “Sakura-class Patrol Vessels” were simultaneously launched at the JMU Yokohama Isogo Factory and named “Hinoki” (OPV-903) and “Sugi” (OPV-904) respectively. This naming continues the tradition of old Imperial Japanese Navy destroyer names, marking a significant step towards strengthening Japan's maritime defense posture.

The “Sakura-class Patrol Vessels” are a new category of warships developed to enhance vigilance, surveillance, and intelligence-gathering capabilities in Japan's surrounding waters. They are expected to complement existing patrol capabilities and respond to diversifying missions. The first vessel, “Sakura” (OPV-901), and the second vessel, “Tachibana” (OPV-902), have already been named and launched.

However, the timing of this launch ceremony and the chosen ship names generated significant buzz on social media. As “Hinoki” (cypress) and “Sugi” (cedar) are the primary plant culprits behind “Kafunsho” (hay fever), which afflicts many Japanese people, numerous humorous comments were posted, such as “Names that are tough for hay fever sufferers,” “Pollen cannon-equipped vessels,” and “Just seeing the characters made me sneeze.” Some users even sarcastically asked, “Why didn't they call them the 'Kafun-gata' (Pollen-type) patrol vessels?” Others speculated that “the names might have been chosen to coincide with the season.” The topic briefly trended, showing the widespread engagement it garnered.

On the other hand, voices also emerged highlighting the continuation of Imperial Japanese Navy traditions in the naming. Ship names like “Hinoki” and “Sugi” were also seen in destroyers that were active during World War I, lending a sense of historical weight. Additionally, comments were made regarding the naming conventions for Self-Defense Force vessels, such as “JSDF ships do not receive personal names,” and predictions for future names like “Shirakaba” (white birch) and “Hannoki” (alder) were also seen.

Reports indicate that the launch ceremony on the day, like the previous one, took place under cloudy skies. Amidst ongoing tensions in surrounding waters, the “Sakura-class Patrol Vessels,” also dubbed “Reiwa's Coastal Defense Ships,” are highly anticipated for their future contributions. Yet, their names, quite unexpectedly, captivated public attention by intertwining with a seasonal topic.

The context

For non-Japanese readers, several points are crucial to understanding the full scope of this news. Firstly, the Japan Maritime Self-Defense Force (JMSDF) is Japan's naval branch, operating under constitutional constraints that define its role as purely defensive. The introduction of Offshore Patrol Vessels (OPVs) like the Sakura-class is part of Japan's ongoing efforts to enhance its maritime domain awareness and respond to increasing activities by foreign vessels in its surrounding waters, particularly in the East China Sea and other strategic areas. The “Reiwa” era refers to the current era in the Japanese calendar, which began in 2019, giving the “Reiwa's Coastal Defense Ships” moniker a contemporary feel.

Secondly, the naming convention is significant. The JMSDF often inherits names from ships of the Imperial Japanese Navy (IJN), reflecting a continuity of naval tradition despite the post-war changes. Historically, destroyers and smaller vessels were often named after weather phenomena, plants, or mountains. “Hinoki” (Japanese cypress) and “Sugi” (Japanese cedar) are both common tree names, fitting this tradition.

Lastly, and perhaps most strikingly for this article, is the reaction to the ship names “Hinoki” and “Sugi” due to hay fever. “Kafunsho” (花粉症), or hay fever, is a national affliction in Japan, with a significant portion of the population suffering severely, especially in spring. Japanese cedar (sugi) and cypress (hinoki) pollen are the predominant allergens, making March a peak season for many. The humorous and sometimes exasperated comments on social media highlight how deeply ingrained and widespread this seasonal suffering is in Japanese culture. The juxtaposition of a serious national defense initiative with a common, relatable seasonal nuisance creates a uniquely Japanese cultural moment that resonated widely online.