Macro Endgame
The early phase of the endgame when plays are large (oyose). (The term 'macroendgame' is used in The Endgame by Ogawa and Davies, but 'megaendgame' is more accurate since 'o' here is big rather than long.)
It is often a tense time, since individual plays are very big (say in the range 15 - 20 points deiri) while sente / gote relationships can be quite unclear and may depend on serious amounts of reading. Thick plays in the endgame can still work well at this juncture.
Otake Hideo has often shown his great strength by whole-board attacks during this part of the game.