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Nature Program to Swim with Wild Dolphins in the Ocean
Delphines
The Blue Inc三木真理子イルカ
御蔵島_Delphins
バハマのイルカ_Delphines
Bahamas_Delphines
1993 - 2015
underwater

Currently serving as the president of The Blue Inc., I, Mariko Miki, used to run a nature experience program 'FEEL the NATURE in Mikura Island' every summer for more than 20 years, from 1993 to 2015 on a remote island in Japan.

 

The program included swimming with wild dolphins in the ocean, walking through deep forests rich with natural springs, and gazing at star-filled skies at night—immersing oneself in nature beyond the five senses and feeling, “I too am part of this great nature.”


In addition, there was a program called 'Dolphin Cruise in the Bahamas', a week-long boat life experience in the Caribbean, where participants lived aboard a boat surrounded by nothing but the endless blue of sea and sky, with no islands in sight.

When dolphins appeared, they entered the sea to swim with them, and when the winds grew too strong or water gets too rough to stay in the open sea, they landed on islands to experience the local lifestyle and culture.

These programs were offered under the name 'Delphines', derived from the Jacques Mayol’s coined term homo-delphinus (“dolphin human”).

However, with the growing influence of social media and improved access from Tokyo to Mikura Island , the number of visitors coming to swim with dolphins increased, as did the number of dolphin-swim boats. Restaurants and souvenir shops opened, and while the island became more convenient and enjoyable as a tourist destination, the unique atmosphere I once loved gradually began to change.

 

At the same time, in the Bahamas, the trusted boats I had relied on were destroyed by some major hurricanes, leading the companies to shut down. For these reasons, the activities of Delphines came to an end in 2015.

Since then, I have been dedicating myself to my current work and volunteer activities out of a desire to “give back to the ocean and nature that gave me so many joyful times and valuable lessons.”

 

I would be grateful if you could learn about these foundational activities that shaped who I am today.

Mariko Miki​

HISTORY

1991 - 1992

Study in Florida

During my university years in Japan, I obtained my scuba diving license in the main island of Okinawa, and later traveled to remote islands there to dive. I was deeply moved, realizing, “There exists an entirely different world beneath the ocean, separate from the land where I live!”
Among all the seas I later explored around the world—Hawaii, Florida, the Caribbean, Central America, Australia, Thailand—the coral reefs I saw in Ishigaki Island in Okinawa at that time were by far the most beautiful.

After graduation, I began working in public relations at a company in Tokyo, but found little fulfillment in my daily routine.

One day, while watching a TV program about marine life, I saw footage of dolphins swimming in the blue ocean. In that moment, I felt as if something had gripped my heart tightly, and tears began to flow uncontrollably.
I had never particularly been interested in dolphins before, so I couldn’t understand why I was so deeply moved. Wanting to find the answer, I devoured every book about dolphins I could find at the library. Yet most were either written by aquarium specialists and focused on ecology, or were about whaling, none of which provided the answer I was seeking. Then, in one book, I came across a sentence mentioning that “in other countries, research is being done on wild dolphins.” Something inside me immediately responded to those words—wild dolphins.

This was in the days before the internet, but I began researching where such studies were being conducted. I thought to myself, rather than going to places like Hawaii or Australia where many Japanese people already lived, I should challenge myself by going somewhere less accessible and less frequented by Japanese travelers. That is how I chose Florida.

With only modest savings from my time as an office worker, pursuing a degree was not an option. Instead, I enrolled in a small collage where tuition was affordable and where I could take classes such as oceanography, advanced scuba diving, and rescue diving—earning credits for such classes was something quite characteristic of Florida universities. Alongside my studies, I visited dolphin research facilities throughout Florida.

Even on the nearby beaches, it was common to see dolphins. On the bridge I crossed on my way to go shopping, I could look down and see dolphins swimming below. At a friend’s house along the inlet, dolphins and manatees would often come right up to the shoreline. For the locals, this was an ordinary part of daily life—so natural that nobody made a fuss about it. For me, however, while dolphins had become a familiar presence, my desire to meet them underwater kept growing stronger.

Eventually, I became the first Japanese participant in a week-long public program at the Dolphin Research Center in the Florida Keys, where people could learn about dolphins and the marine environment. The facility kept dolphins that had retired from aquariums or had been born in captivity and could not survive in the wild. To fund its operations, it also ran programs for tourists, allowing them to enter the water and hold onto a dolphin’s dorsal fin to be pulled along.

During the program, I too had the experience of holding onto a dolphin’s dorsal fin and being pulled through the water. Yet, instead of feeling joy, I could only think how sad it was that these dolphins, even after leaving aquariums, still had to perform tricks to earn food and entertain humans. I found no enjoyment in it at all.

When I honestly shared these feelings with the staff, they told me, “In the Bahamas, there are places where people can swim with wild dolphins in the ocean.” The moment I heard that, I thought, That’s it!

 

I immediately contacted some of the boat operators there. But they explained, “People might imagine that in the Caribbean you can swim year-round, but unfortunately in winter the trade winds are too strong, and we can’t run trips. The next operation will be in May.”

By that time, I only had enough savings to cover living expenses until March. With great reluctance and a heavy heart, I returned to Japan—already determined that one day, I would go back to meet wild dolphins in their ocean home.

May - September, 1993

Izu Peninsula

Back in Japan, I still longed to “do something related to dolphins,” yet I felt, “Becoming one of those staff in aquarium dolphin shows just isn’t it...” So I returned to my life as an office worker.

Then I met some women who had just come back from swimming with wild dolphins in Hawaii. They said to me, “Japan is surrounded by the sea—surely there must be a place here where we can swim with dolphins too, right?”

 

Inspired by their words, we decided to spend our weekend traveling down the eastern coastline of the Izu Peninsula, from Odawara to Shimoda. With no appointments or introductions, we simply stopped by fishing tackle shops and spoke directly with fishermen at the ports, asking, “Do you ever see dolphins around here?”

Some were wary and even asked, “Hey, are you with Greenpeace or something?”

But finally, one fisherman told us, “If you really want to see dolphins, go to Mikura Island. There are dolphins that stay around the island.”

At the time, though, there was no internet, no Google Maps so we had no idea how to research this mysterious “Mikura Island” that we had never heard of before. Then, almost miraculously, the very next day after returning from Izu, I received a phone call from a friend who had just become a member of a newly established organization in Japan called ICERC (International Cetacean Education Research Center) Japan, a branch dedicated to the study of dolphins and whales.

 

They said, “Apparently there’s a small island near Miyake Island where lots of dolphins live, and our research members are planning to do a scouting trip there.”

I was stunned and asked, “Wait—could that island possibly be called Mikura Island!?”

And just a few weeks later, I was invited to join a small group of their research members on a trip to Mikura Island.

Looking back, it’s fascinating that around this time, several people—mostly women—began to take an interest in dolphins and started moving in this direction. Even now, I find it remarkable that women were at the very heart of these early movements.

Mikura Island

May 22, 1993

​At that time, the large passenger ships departing from Tokyo did not stop at Mikura Island; instead, they sailed from Miyake Island on to Hachijo Island. So we disembarked at Miyake, waited for a few hours, and then transferred to a small local ferry called Ebine-maru.

1993年5月・8月

えびね丸 デルフィネス

Ebine-maru

御蔵島船揚げ場 宇津孝

Back then, the term “dolphin swim” didn’t even exist, and there were no local fishermen on the island who would take outsiders out to sea. Fortunately, Takshi Uzu—a skilled underwater cameraman with extensive boating experience, and later dearly missed after his passing—was visiting the island as part of the research team. He borrowed a boat from one of the island’s fishermen and captained it for us.

御蔵島イルカ Delphines

First wild dolphin that I saw underwater in Japan

My first encounter with wild dolphins in the water

My first encounter with wild dolphins in the water began as we set out to sea in a small outboard boat. We circled the island from the east, but for half the way we didn’t see a single dolphin. Instead, I found myself fascinated by the striking scenery—the deep, endless blue of the Kuroshio Current, the sheer cliffs of the island’s rugged rock face, and the sight of fresh spring water flowing out from cracks all along the cliffs.

Around the point opposite the port, we finally spotted a dolphin’s dorsal fin. Takashi who was piloting the boat, observed the dolphins carefully and, after waiting for a while, finally said, “You can try getting in now.”

I slipped into the water.
It was cloudy, and the sea was dark.
Peering intently into the dim water, I began to make out faint, glowing shapes—the white tips of dolphins’ beaks, round and dot-like, approaching from a distance.

As they drew closer—about ten meters away—one dolphin stopped directly in front of me. It was checking me with its sonar.
Seeing a wild dolphin up close for the very first time, I expected to feel something like, “Ahhh! My dream dolphin! So cute!”. But instead, an entirely different emotion arose within me—an inexplicable sense of natsukashii, nostalgia. It was as if I had reunited with a childhood friend I hadn’t seen in many, many years.

Why I felt nostalgic at that moment, I still don’t know. But I remember the scene with absolute clarity, as if it had been captured in a photograph.

In the encounters that followed, we swam into the water a few more times to meet other dolphin pods. Back then, however, the dolphins did not approach humans as eagerly as they sometimes do now. Instead, they kept their distance, observing us from afar. And we, in turn, observed them. It was the kind of relationship one might expect between truly wild animals and humans.

When I returned to Tokyo, I told the friends who had gone with me to inquire along the Izu Peninsula about the dolphins of Mikura Island. Immediately, they said, “We want to go too!” So, in August, I made another trip to the island with them.

At that time, the research members were renting an old empty house, and once again they kindly let us stay with them for a few nights.

 

During that visit, the dolphins displayed some very interesting behaviors—but that is a story for another time.

In this way, people from outside the island had begun to come specifically to see the dolphins. But the islanders told us, “Even if people want to visit to see the dolphins, we don’t have guesthouses or the ability to host them, so please don’t spread the word too much.”

Hearing this, I left the island thinking, “Perhaps it will be difficult to come back here again.”

June - August, 1993

Shimoda in Izu Peninsula

​From our inquiries along the Izu Peninsula, we had learned that “if you run a boat for a few hours off the Izu coast, you can sometimes see dolphins or small whales.” So even if we couldn’t return to Mikura Island right away, we thought, “At the very least, we want to head out to sea from the Izu Peninsula.”

We went down to the port of Shimoda, which is close to the open ocean, to look for a boat. Among the fishing vessels, we noticed a cruiser. Its owner had just returned to port and was washing down the boat, so we approached him and explained, “we are looking for a boat that could take us dolphin watching from Shimoda.” He replied, “I usually take fishing clients out, but I’d like to see more people enjoy the ocean. If you can gather enough people, I’ll charter the boat for dolphin watching.”

Thanks to his kindness, from June to August we went out to sea several times from Shimoda with friends who also wanted to see dolphins.

The very first time we took the cruiser out to the open ocean, I stood on deck, feeling the wind and looking up at the vast blue sky. It may sound dramatic, but in that moment I realized—almost like a revelation—“I too am part of nature.”

 

In the end, we never encountered dolphins. The only sighting was once, near Miyake Island, when we came across a pod of pilot whales. Yet even without dolphins, the experience of venturing far from land and out into the ocean itself was powerful and unforgettable—not just for me, but for everyone who joined.

デルフィネス下田ドルフィンウオッチング

Left-Mariko

Right-Sumiko who started the dolphin program together 

三本岳 Delphines

'Three rocks' near Miyake Island where we encountered a pod of pilot whales

1994 - 2015

'FEEL the NATURE in Mikura Island' 

Despite the concerns of island residents who worried that “it would be a problem if too many tourists came,” the island was featured in diving magazines and on TV as 'the island where you can encounter with wild dolphins' during the autumn and winter of 1993.


Although the island itself had neither accommodations nor diving shops, the nearby island of Miyake Island did, and many mainland dive shops—especially from Tokyo—were already organizing tours there. As a result, it became clear that “starting next spring, many boats will be coming from Miyake Island.”

 

In response, the island established 'Dolphins Association of Mikura Island,' and, with advice from researchers from ICERC Japan as well as knowledge from overseas experts, basic rules were set, such as “do not chase” and “do not feed” the dolphins.

Mr. Uzu encouraged us, saying, “Our purpose is research, so we’re not interested in tours for the general public. But if lots of boats are going to come from other islands, then it’s better to create a proper system to receive visitors here as well. Since you genuinely love dolphins and have been coming since last year, you should take the lead.” So we looked for a fisherman who would help us, then a local fisherman called Gen agreed to help us by lending and renovating an empty house and operating dolphin boats.

Thus, beginning in 1994 and continuing for 22 years until 2015, we carried out not only dolphin-swimming activities but also a comprehensive nature experience program that allowed visitors to immerse themselves in the island’s natural environment, including its deep forests and fresh springs.

Dolphins we encountered in 1994​
御蔵島イルカ デルフィネス
Mikura Island wild dolphins Delphines
御蔵島イルカ親子
御蔵島親子イルカ デルフィネス

All of these photos are from 1994. In the beginning, only young adult dolphins full of curiosity would come close, but gradually even mothers with calves began to approach us.

Photos of the dolphins from later years will be featured on a gallery page at a later date.

Hiking in the Forest
御蔵島ハイキング デルフィネス
御蔵島御山縦走 デルフィネス
御蔵島湧水 デルフィネス
御蔵島の山 デルフィネス
Scenery
Mikura Island Delphines
Mikura Island spring water Delphines
Mikura Island Delphines
御蔵島 天使の梯子
御蔵島桟橋 デルフィネス
御蔵島 流れ星 デルフィネス
Untitled design-6.jpeg
Dolphin Cruise in the Bahamas Delphines

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