トカラ列島の民俗文化：南北文化の結節点Cultural Nexus Between North and South

Since June 21, the Tokara Islands in the southern part of Kagoshima Prefecture have experienced an ongoing earthquake swarm exceeding 2,000 events. As of today’s writing (16:50 Japan time), approximately 25 quakes have occurred today alone, with a maximum seismic intensity of 4. Previously, I discussed the underwater volcanic eruption near Kikai Island, slightly north of the Tokara Islands, which significantly changed the conditions of the Jomon period. Today, I will explore the historical characteristics of the Tokara region.

The Tokara Islands consist of seven inhabited islands situated between Yakushima and Amami Oshima within southern Kagoshima. Due to this unique geographical setting, the region has been regarded as a meeting point between northern Yamato culture and southern Ryukyu culture, drawing considerable attention from folklorists. Leading this research was Toshimi Shimono, a pioneering folklorist who extensively studied the Tokara Islands between the 1950s (1955-1964) and 1960s-70s (1965-1974), culminating in the publication of A Folk Record of the Tokara Islands (トカラ列島民俗誌), which first comprehensively revealed the islands’ nature as a cultural hybrid zone.

Shimono’s studies indicated that Tokara customs exhibit a unique layering of cultures from both southern Kyushu on Japan’s main islands and the Amami-Ryukyu region. The entire archipelago thus demonstrates a remarkably distinctive blend of northern and southern cultural elements. For instance, Tokara’s religious practices combine mainland Japanese shrine rituals with the southern nature worship and ancestor veneration characteristic of Amami and Ryukyu. Each island hosts small-scale shrines honoring mainland deities such as Hachiman (八幡神) and Kanayama (金山神). Notably, Akuseki Island features Kanayama Shrine (金山神社) and Sakamori Shrine (坂森神社), whose torii gates bear a unique serrated design called kyoshimon (鋸歯文). This pattern serves as protection against evil spirits and is rarely seen in shrines elsewhere in Japan. Despite this, the shrines themselves are modestly constructed, reflecting southern-style worship traditions from Amami and Ryukyu that center on natural stones and large rocks as sacred objects. Such nature-based beliefs once prevailed throughout the Japanese archipelago, and while many faded during Japan’s modernization and standardization of shrine practices, they endured in relatively remote southern areas like Tokara.

Additionally, Tokara retains historical evidence of female-led religious ceremonies reminiscent of the noro (ノロ), miko who held significant ceremonial and spiritual authority in the Ryukyu Kingdom. According to Shimono’s reports, islands in the southern part, such as Takara Island, historically had noro-like figures conducting rituals for fertility and protection. Thus, elements of Amami-Ryukyun miko rituals persisted and influenced the Tokara region, with women traditionally leading prayers to ancestors and local deities. At the same time, mainland influences also remain evident, with many households maintaining kamidana (household Shinto altars) and butsudan (Buddhist family altars), where Buddhist rituals such as ancestor veneration and annual memorial services occur. This reflects the lasting impact of syncretic Shinto-Buddhist traditions prevalent in mainland Kagoshima, exemplifying Tokara’s fascinating amalgamation of northern and southern cultural practices.

One of Shimono’s most intriguing findings relates to legends of the defeated Heike clan (平家), who fled following the Genpei War and the pivotal Battle of Dan-no-ura in 1185, permeating the Tokara Islands. Taira Island (平島), in particular, is said to have been the first refuge for these Heike fugitives, and its name is believed to derive directly from the clan.

Historically positioned as a crucial maritime junction linking mainland Japan with Amami and Ryukyu, the Tokara Islands also prominently feature prayers for safe navigation and prosperous fishing. Like mainland Kagoshima, the northern islands, particularly Kuchinoshima, have traditionally worshipped Ebisu (恵比須神), a deity associated with maritime safety, establishing dedicated facilities known as Ebisu-do (えびす堂) to pray for abundant catches. Conversely, prayers directed towards Nirai Kanai (a mythical paradise across the sea) and rituals dedicated to ocean kami, typical of southern traditions, coexist, forming distinctive cultural practices uniquely synthesized within Tokara.

Annual events in Tokara Islands also showcase a blend of customs based on both the traditional lunar calendar and the modern solar calendar. In Amami and Ryukyu, traditional lunar calendar observances remain dominant for festivals such as Obon and harvest celebrations, which are similarly prevalent in Tokara. A notable event is Akuseki Island’s peculiar festival, Boze Matsuri, where masked deities known as Boze—covered entirely in mud and donning peculiar spiked masks—visit villages accompanied by drumbeats, representing Japan’s ancient visitation deity (来訪神) traditions. Although this ritual includes distinctly southern elements, similar customs persist nationwide, placing Tokara’s version uniquely within Japan’s broader cultural heritage, an interpretation notably influenced by the folklorist Shinobu Orikuchi.

Since the Meiji period, Tokara has also embraced Japan’s mainland traditions for celebrating the New Year based on the solar calendar, such as placing kadomatsu (門松) to welcome the Toshigami (歳神, the New Year’s deity) and eating zoni (a traditional soup dish). Nevertheless, simplified lunar New Year celebrations also persist separately, with certain islands maintaining distinct lunar calendar observances. Although administratively integrated with mainland Japan since Meiji, Tokara has retained traditional practices due to post-war interactions with Amami, which remained under U.S. administration for an extended period.

Furthermore, Tokara maintains traces of medieval warrior culture due to the deep historical impact of the defeated Heike warriors who settled these islands. For instance, on Taira Island, the traditional coming-of-age ritual known as genpuku (元服の儀) endures, performed not annually but only when there are children of suitable age—usually around thirteen—marked by a community-wide, traditional ceremony rooted in Heike customs.

Linguistically as well, northern islands exhibit a heavy influence from the Satsuma dialect of southern Kagoshima, whereas southern islands like Takara and Kodakara retain the Amami dialect. Additionally, Suwanose Island, currently experiencing volcanic activity, became uninhabited in the 19th century, later resettled by migrants from Amami Oshima during the Meiji period, preserving strong Amami linguistic traits.

In brief, Tokara’s folk culture uniquely intertwines elements from both mainland Japanese and southern Amami-Ryukyu traditions. When Shimono conducted his studies, Akuseki Island had around 170 residents; today, frequent earthquakes have led to declining populations, raising concerns over potential cultural loss. Japan’s history is characterized by hidden migratory patterns triggered by earthquakes and volcanic eruptions. The ongoing seismic and volcanic activity in Tokara Islands offers us a glimpse into this lesser-known aspect of Japanese history.