Staff Blog

This category is the blog written in english

Searching Nudibranchias

I studied how to search Nudibranchia  last week.

5. April, 2022

Weather: Sunny
Ground Temperature: 9~18℃
Water Temperature: 17.8℃
Wind Direction: Southwest(3m/s)
Swell: 1.0~1.5m

Hello!!This is Hirotaka Koike.
Long time no see!!

I  took a week off last week.
So, I couldn’t update this blog for a while.

While a holidays, I studied how to search Nudibranchia in Kumomi, Shizuoka pref.
I started to search Nudibranch in Kushimoto two years ago.

I’ve been able to find Nudibranch little by little.
So now it’s  fun to find Nudibranchs !!

Recently, I feel that the number of Doridina has increased.
The Nudibranch that will be seen in the future are likely to change, I think.

Last,  I will show you some Nudibranch I could find today’s diving.

The color is so beautiful!!
Please come to Kushimoto to see Nudibranchs.

Thank you for your reading!!



Photo dive

Taking a picture of small creature .

26,March 2022

Weather: Rainy
Ground Temperature: 13~16℃
Water Temperature: 16~17℃
Wind Direction: Southeast(3~6m/s)⇨Northwest(4~5m/s)
Swell: 0.5~1.0m

Today, I went to diving with a guest who have macro digital camera.
He said that he want to take a picture of Japanese pigmy seahorse.

So, I try to find out it.
As a result, I can find out 8~10 pigmy seahorse today.

we can meet many japapigs in a dive. So he could take a many kind of pictures.
He looks so happy!!

Now, there are so many Japanese Pigmy Seahorse  in Kushimoto area, I guess.

I want to know how many Japapig  lives in.

If you want to see it, I recommend you to be coming now!!




Photo Diving

We enjoyed taking a pictures in two dives.


Weather: Cloudy
Ground Temperature: 8~13℃
Water Temperature: 16~17℃
Wind Direction: East(5~7m/s)
Swell: 1.0m

Today, we enjoyed taking  underwater  pictures .

Today’s guest said that he had never seen this shrimp.

The shrimp is called “Laomenes cornutus”.
It’s rare shrimp in Kushimoto.

And he also favorites “Short-bodied pipe fish”.

There are beautiful seaweed behind this fish.
I like this picture (^^)

Then, I joined the group that is called ” Nudibranch  lovers’ association”.
The group have five members. And the theme of this group is searching  many Nudibranchs in Kushimoto area.

So, I try to look for more Nudibranchs as much as I can.
If you are interested in Nudibranchs, Please come to our shops.

I wanna look for Nudibranch with you.

After the effects of  COVID-19 have diminished , I will do my best  guests from overseas to enjoy diving in Kushimoto!!!

So, If you will be able to visit Japan, please come and visit our shop!!
You can spend good time I think.


Shirt-bodied pipe fish, Laomenes cornutus, Verconia purpurea


Sumisaki, Bizen

Many kinds of small underwater creatures

I can enjoy looking for small creatures.

22. March, 2022

Weather: Cloudy⇨Rainy
Ground Temperature: 9~12℃
Water Temperature: 17℃
Wind Direction: Northeast(5~6m/s)
Swell: 1.0m

I go to diving two times today.
Today’s guest have a macro camera.

So, I look for many kind of small creatures.
Recently, we can see many pigmy seahorse.

The size is about 5mm~1cm.
That is very small and so cute.

Today, there’re five pigmy seahorse in the same place.
I was surprised!!!

The most impressive creature the guest saw today is this crab.

Could you find out it??
Doesn’t it look like Comatulida? The name is Hairy Shrimp.

In the last dive, we can find out rare fish.
The fish is Ghost pipe fish!!

I wanna take a picture by myself…
The soft coral behind the fish is so beautiful.

There are many kinds of creatures in Kushimoto recently.
For example, seaslugs, Shrimps, small fishes, turtle and so on.

You cannot see everything in a day I guess.

The visibility is getting clear.
Please come to Kushimoto and our shop!!


Japanese pigmy sea horse, Hairy Crab


Sumisaki, Good Wrasse world, Ghost pipe fish

Japanese Pigmy Sea Hourse

I was looking for Small creatues today.

15th March, 2022

Weather: Sunny
Ground Temperature: 17~23℃
Water Temperature: 17℃
Wind Direction: Northwest(6~8m/s)
Swell: 1.0~1.5m

I go to 3 dives in a day with the guests who like small creatures.
One of the guest want to see Pigmy Sea Horse and Phycocaris simulans.

So, I try to find out it.
As a result, I can find out them.

When I would be happy if I could meet the requests.

Japanese Pigmy Seahorse is about 1cm.
It’s very small and cute!!

There is Emperor Shrimp in our dive site.

These color is so beautiful!! I like this combination(^^)

At last, please introduce a blog that I join.
The blog’s name is “Kushimoto-koza guide”.

the blog association has 5 members. I write the blog in English  in 14th every month.
If you have a time for reading, please check this blog.

Thank you for your reading.


Japanese pigmy sea horse, Emperor shrimp, Phycocaris simulans


Sumisaki, Bizen

Our dive site is closed again…..

We went to Sue diving center.

7 March , 2022

Weather: Sunny
Ground Temperature: 7~11℃
Water Temperature: 16~17℃
Wind Direction: West(8~11m/s)
Swell: 1.0m

Today, Kushimoto’s dive site is closed again.
So, we went to Sue Diving Center located in Kii-Ooshima.

The visibility is getting worse.But, there are many kinds of small creatures.
So, We enjoy diving in there.

I’ll show you some creatures I met in Sue’s dive site.


Uchiura beach, Sue

The big I say is small for others

I show the guest a variety of  underwater creatures.

February  23, 2022

Weather: Sunny
Ground Temperature: 2~10℃
Water Temperature: 16.4℃
Wind Direction: Northwest(4~8m/s)
Swell: 1.0~2.0m

Recently, Kushimoto’s diving area is closed due to strong wind and waves.
But, we can dive in Kushimoto  today because the wind is getting weaker.

At last month, I always look for Nudibranch.
So, it seems that the scale of the size when  looking at creatures has shifted…haha

When I introduced  some Nudibranch, I wrote this Nudibranch is big!!
But, the guest don’t think the Nudibranch is big.

I used to look four like this size.

the size is about 5mm.
I have to fix my scale….

Then, I will show you beautiful seaweed.

This seaweed can only be seen in five area in Japan, including Kushimoto.
Don’t you think this is so beautiful?

You can see it from now to June.
Please come and see it.

There are many kind of creatures now.
So, you must be able to enjoy diving in Kushimoto.

I update some pics in our Instagram.
Please follow our Instagram account.


Japanese pigmy sea horse, Eriocauloncea sp, Favorinus japonicus, Gonibranchus ruformaculatus

Maintenance day

we cannot dive due to high wave.

February  21st, 2022

Weather: Sunny
Ground Temperature: 3~8℃
Water Temperature: (Closed)
Wind Direction: Northwest(8~11m/s)
Swell: 2.0m(Closed)

There was a strong wind in Kushimoto all day long.
So, It was a high wave at the diving point and it was a day when I couldn’t dive.

I will devote myself to the maintenance of equipment on these days.
Today, Cylinder maintenance was done.

Cylinders used in salt water will rust, so we regularly repaint  and maintain.

After finishing repainting, the cylinder looks like this.

The rusted part is gone, isn’t it a good feeling?
I really want to repaint the entire cylinder, but I didn’t have enough time to finish it…

The wind is getting weaker and I’m looking forward to diving in a beautiful tank.

There are many kinds of creatures in Kushimoto now.
I wonder if the wind is getting weaker quickly .

I will show you the underwater creatures in our Instagram .

Seamans Club Instagram:

If you have a time, please check it and follow our account !!!

Kushimoto area

I can dive in Kushimoto today.

19th February , 2022

Weather: Cloudy→Rainy
Ground Temperature: 5~12℃
Water Temperature: 17℃
Wind Direction: Northeast(4~8m/s)
Swell: 1.0~1.5m

Hi, this is Hirotaka from Nanki Seamans Club.
I’m sorry that I couldn’t write blog for a while.

We cannot dive in Kushimoto for four days due to strong wind and high waves.

But, The sea become calm today.
So,we can dive in our dive site for the first time in many years.

I dived with the guest who have never dived Kushimoto today.
So, I introduce the major creatures of Kushimoto.

At first, I introduced Scarbreast tuskfish.
I think it’s a representative fish of Kushimoto.

When the Scarbreast tuskfish find diver, he start chasing divers.
It’s like a dog chasing the owner and it’s cute(^^)

And, when I take launch with guest, I received a request to see sea turtle and Longtooth grouper. So I search for them in the second dive.

As a result, I can meet both of them.

The sea turtle is resting on the rock.
It was a sea turtle that never escaped even when diver was approaching.

So, we can take a photograph with the sea turtle easily.
The guest was very satisfied.

The forecast said the wind will get stronger tomorrow.
I guess we cannot dive in Kushimoto again….

We will go to Sue diving center tomorrow.


Sea turtle, Scarbreast tuskfish


Sumisaki, Bizen

The condition is so good!!

The sea water is clear!!

7.February , 2022

Weather: Sunny
Ground Temperature: 3~10℃
Water Temperature: 16.6℃
Wind Direction: Northwest(3~4m/s)
Swell: 1.0m

Today,  I went to coral conservation activities .
Recently , the coral that live in Kushimoto are eaten by Crown-of-thorns starfish.

So, many coral become white…
Kushimoto’s coral reef is protected by Ramsar Convention.

So, there are many beautiful coral reef.

I show you the movie that state of conservation activities.

please show it.


Crown-of-thorns starfish