To further my studies, I took a 2 day  Nerikiri Art Master Certified Instructor Course held by Japan Saloneze Association (JSA). This 12 hour course is open to Nerikiri Art Certified Instructors. 

I learned how to use new tools such as Kashi Basami (Scissors for kashi (sweets) and sasara, and learned new techniques such as harikiri (cutting with needle point chopsticks. 

We also used other types of dough such as konashi, uiro, kanten, and yokan. I'm not sure how much I can implement his in my class but hopefully I will be able to conduct advanced courses in the future (after much practice)

For More details on this course, please visit JSA's website. (Please select language to translate).

At the moment, they don't have an English textbook but they may come out with one next year.

Since I get a lot of queries on where to buy wagashi tools in Tokyo I've compiled a list of shops in the Kappabashi shopping district. Kappabashi is a street situated near Ueno Station which is on the east part of Tokyo. If you are not familiar with Kappabashi, its a street where you can buy anything related to cooking, from pots and pans to lanterns and signages for restaurant owners. So if you want to get the best knives or a nice pair of chopsticks, or a fancy lacquer dish in Japan here is the place. Just make sure you have plenty of time as you can easily spend the whole day here! Shops are open on weekdays from 9am to 5pm, Some shops will be closed on Saturdays and most shops will be closed on Sundays and Public holidays so it is advisable to go on weekdays. 

Location & Map​
Kappabashi can be accessed by foot from Tawaramachi Station on the Ginza Line or Asakusa Station on the Tsukuba Express Line. You can also walk from the Asakusa on the Toe Asakusa Line, but it may take about 15 minutes.

1. Asami Kashidouguten
Asami is a shop dedicated to only wagashi tools. This shop is at the entrance of Kappabashi street, across from Niimi, the symbol of Kappabashi (the giant chef that is on the rooftop of the building). Despite the small size of this shop, it carries a vast variety of tools from small wooden sticks to large machinery for factories. They also create their original tools and molds which can be ordered.
Open 9-5 Mon-Fri.
Website in Japanese 

2. Flavor Land
This is not actually a tool shop, but you can get any kind of food colorings or flavor essences you need to make wagashi. Open 9:30-5 Mon-Fri.
Website in Japanese

3. Arai Shoten
This shop carries not only wagashi tools but any tools related to sweets making. This is my favorite place to buy the tiny wagashi cutters.​ Open 9-5:30 Mon-Sat.

4. Majimaya Kashidouguten
This was my favorite shop to buy cookie cutters as well as wagashi cutters, At the moment, they seem to be doing a major renovation (or it looks more like they are rebuilding) so the shop is very small and the selection is limited, but you can buy through their Online shop on Amazon and Rakuten. Open 9-5:30 Mon-Sat.​
Website in Japanese
​Online shop on rakuten
Online shop on Amazon 

5. Yoshida Kashidouguten
This shop also carries  wide range of sweets making tools. From molds to cutters for beginners professionals, you will likely find what you need here.　Open 9-5:30 Mon-Fri.

6. Asai Shoten
Although you may find wagashi tools here, their main products seems to be for western sweets. I would usually stop by to see if there are any good deals. Open 9-6 Mon-Sat.
Website in Japanese 
Online Shop on Rakuten

7. Yokoyama
This shop has been doing business since 1905, operating for over 100 years, they have a wide selection of wooden wagashi molds and tools. I usually buy my wagashi cutters here too. Open 9-5:30 Mon-Sat.
Website: http://www.yokoyamacake.com/

There are other shops that carry wagashi tools that I haven't mentioned here, so do browse along the street and have fun treasure hunting!
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​For basic tools that you can buy online please visit this page.