Oriental style footed stoneware bowl/planter

Can anyone help ID this one. I've had this for about 10-15 years. It's kind of 1950's style in a dark green glaze, quite heavy (not slipware). The mark on the bottom is quite distinctive but I can't find it in any of the studio pottery marks guides - any help greatfully appreciated.

https://i.servimg.com/u/f84/15/29/73/30/img_3415.jpg
https://i.servimg.com/u/f84/15/29/73/30/img_3416.jpg
https://i.servimg.com/u/f84/15/29/73/30/img_3417.jpg

It's a Japanese ikebana vase. I'm afraid I don't know Japanese factory marks, but you might find it on the Gotheborg.com website

Ah yes, I can see that now you mention it. Nice shape but boring glaze. Thanks!