My works 3-sun 18-step puzzle boxes
31-Mar-2025A new week starts today, but it seems like there will be many days with bad weather. The temperature is also ...
Hiroyuki Oka
My works 
My works Kannuki panels
28-Mar-2025It has been raining since this morning, continuing from last night, and the humidity has been quite high. Des...
My works Side panels
27-Mar-2025Today, the temperature was fairly comfortable. However, in Japan, we often have what’s called a “spring storm...
My works Top panels
26-Mar-2025Today wasn’t just warm—it was really hot! I heard that in some parts of Tokyo, the temperature reached 30 deg...
My works Aruki panels
25-Mar-2025Today was another very warm day. The temperature was just right, making it a comfortable climate for working....
My works 5-sun drawer puzzle box
24-Mar-2025A new week starts today. Since the weekend, the weather has been very warm, and I heard that yesterday’s temp...
My works 3-sun 12-step Japanese puzzle boxes
21-Mar-2025Today was a relatively warm day. Since the temperature was expected to rise, I decided to do the finishing wo...
My works Small processing of the knock box
20-Mar-2025Today is a national holiday in Japan called "Shunbun no Hi" (Vernal Equinox Day). So, my workshop had a later...
My works The Aruki panels of knock box
19-Mar-2025Today, I finally (?) started making the Aruki panels (moving panels) for The Knock Box. First, I began by mak...
My works The side panels of 6-sun box
18-Mar-2025Today, I continued working on the 4-sun "Knock Box." However, since I mainly worked on the 6-sun box, there w...