Sorry Jon I have no information on it whatsoever.ive never spent so long researching something and got so little information.i quite like the temple offering idea there is a video on YouTube where a smith makes a blade for a Shinto temple and it's the same shape as the roof but I struggle with the idea of waki sized blades as temple offerings in the video it was a big blade tachi size.thanks paul.sorry for my confusion I didn't realise the first picture is also my sword and your picture's are correct