Cinema advance ticket purchase

Hi. Visiting Tokyo just before Christmas this year and would like to go to the cinemas to see Wonka. I am really struggling to book tickets to Toho Cinema in Roppongi Hills. The site is completely in Japanese but i have used my google translate feature of phone to change the text to English. I cannot see anywhere for purchasing advance tickets. Any help is much appreciated and many thanks.

Im not sure if the attachments are translating. On review it appears that plenty if seats are available. I find taking screen shots of the progressive pages to booking is easiest. then use google to translate pics for what you need. I know its cumbersome.