How to say "This" in Japanese

When translating "this" into Japanese, you must choose carefully between 今ごろ and 斯界. In Japanese, 今ごろ (いまごろ (imagoro)) is typically associated with "about this time; around now; by now" (Syllabus Level: N3) and represents Refers to a time point that is 'around now' or 'around that time'. On the other hand, 斯界 (しかい (shikai)) maps to "this field/sphere; this profession/line of business" (Syllabus Level: N1) and represents Used formally to refer to one's own or the current field/industry. Often implies a deep understanding or specialization. 「この分野」の丁寧でフォーマルな表現。. A literal translation of "this" can often sound unnatural to native Japanese speakers if mixed up!