Aikikai Tanshinjuku

Aikikai Tanshinjuku

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Aikikai Tanshinjuku, with direct links to Aikikai Hombu Dojo, presents Aikikai style Aikido in Colorado

Prospective students are encouraged to observe or take advantage of one of the introductory offers at One Dojo to decide if Aikido is right for you. One Dojo
3005 Sterling Circle Suite 150
Boulder, CO 80301
Please email [email protected] for more information, or visit our website, https://www.onedojo.org/boulder-aikido-aikikai-tanshinjuku

06/05/2026

Looking forward to connecting with IBCircle members on June 25 to explore how Aikido can redefine our approach to business. While I’ve shared these concepts in standard conference formats before, this marks a first: we are stepping onto the mat for a fully immersive, experiential session. (Kei Izawa)

"IBCircle is the Colorado-based Think Tank and business network for internationally active CEOs, founders, executives, and investors. For more than 22 years, we have been bringing together leaders from 30+ countries — not for superficial networking, but for the kind of candid, peer-level conversations that change how you think and whom you know."
https://conta.cc/4eojxq9

Photos from Aikikai Tanshinjuku's post 06/02/2026

Some group photos from the seminar in Veszprem, Hungary

Photos from Aikikai Tanshinjuku's post 06/02/2026

Izawa Sensei in Ten Shin Kai, in Veszprem, Hungary.

05/15/2026

4 of our black belts are missing today but very active in training

05/05/2026

Izawa Sensei in Veszprem, Hungary this month.

02/25/2026

Izawa Sensei is happy to inform his friends in Europe that he will be in Veszprem, Hungary, in late May. Please drop by to train together.

We would like to invite you to the 2026 Kei Izawa seminar in Veszprém.
The seminar will be held at the new Acticity Sporcenter in Veszprém, Hungary
(https://maps.app.goo.gl/LQRZT2wUL4YgnkYg6) in the last weekend of May
The detailed seminar scedule is:
1. session 30th May 10:00 AM – 11:30 AM
2. session 30th May 2:00 PM-3:30 PM
3. session 31th May 10:00 AM – 11:30 AM
4. session 31th May 2:00 PM-3:30 PM
The contribution is (60 EUR).
Veszprém is a small town, and was the Europian Capitol of Culture in 2023. 2026 host several sport
events during a massive Sport Capitol campaign.
There are several accomodations near the seminar venue, we add some of the selection below:
Gyarmati Panzió: https://maps.app.goo.gl/PYYHaujJ2UNG8JBj8
Balácza Panzió: https://maps.app.goo.gl/tBdkSAXgaypzub6ZA
Hotel Ezüsthíd: https://maps.app.goo.gl/9mwMZZFy3xXzGJVCA
Péter Pál Panzió: https://maps.app.goo.gl/76uGtiwfaLNkyN486
Hotel História: https://maps.app.goo.gl/4bFA3ZdkiSxN7YxW8
Feel free to ask any question, we hope we can meet in Veszprém this spring.
Best regards,
The organizers

02/24/2026

This Thursday 26th, we have the pleasure of having Mario Lorenzo Sensei from Argentina teach at Tanshinjuku, from 5 PM to 7 PM.

His bio is as follows:

AIKIDO
I began my Aikido practice in 1982 at the Club de Gimnasia y Esgrima de Buenos Aires under Professor Néstor Ivanisevic. Following his passing, our entire group joined the dojo of Master Kenzo Miyazawa in 1987, where I continued training until his death in 2003. Within the Asociación Argentina de Aikido (founded by Master Miyazawa), I served as Secretary and, from 2001 to 2015, as the Head of Foreign Relations, acting as the primary liaison with the Aikikai Hombu Dojo in Japan.

In 2015, I was elected President of the Asociación Aikido Aikikai Argentina, an organization affiliated with Hombu Dojo under the technical direction of Shihan Christian Tissier (8th Dan Aikikai). I have represented Argentina three times at the International Aikido Federation (IAF) Congress: Taipei (1992) and Japan (2008 and 2012). In 2019, I was awarded the rank of 5th Dan Aikikai.

Tenshin Shoden Katori Shinto Ryu
I officially began my TSKSR training in 2003, upon the recommendation of Miyazawa Sensei, under Professor Erik Louw (Shidosha, Netherlands). In 2013, Otake Sensei appointed me Shidosha for Argentina. Following Otake Sensei’s retirement from teaching in 2018, I continued my studies under his son, Kyoso Shigetoshi, the current Shihan of the school. In 2019, I received the Mokuroku and was designated Shibu-Cho for Argentina by Kyoso Shihan. To date, I have completed eight training trips to Japan and nine across Europe and the United States.

02/24/2026

Izawa Sensei in Buenos Aires in October 2023. In Ruben Sandoval Sensei's Dojo.

Photos from Aikikai Tanshinjuku's post 02/23/2026

Tanshinjuku with One Dojo at the Lunar New Year celebration at The Yellow Barn Farm, with Reina Krumvieda.
We enjoyed showing some the guests Aikido.

02/20/2026
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Location

Address


3005 Sterling Circle, Suite 150
Boulder, CO
80301

Opening Hours

Tuesday 4:45pm - 7:30pm
Thursday 4:45pm - 9pm