Prefix attached to time words to mean the upcoming one. Common with 年, 月, 週, 学期, etc.
I plan to go to Japan next spring.
Please tell me the schedule for next month's meeting.
since; for the past
Suffix attached to time expressions to indicate a duration from a past point until now. Often used with ～年, ～か月, ～週間, etc.
He is a friend of 20 years.
It hasn't rained since last month.
Next week I'm going on a trip with a friend.
He and I have been friends for ten years now.
future; prospects · bringing in; importing · bringing about; causing; incurring
next year
up to now; so far; hitherto · traditional; conventional; existing
next week
origin; source; history; derivation · originally; from the start; by nature
visit a store; come to a shop
coming to Japan; visit to Japan; arrival in Japan
attendance; coming to a venue
next month
foreign; imported; external · outpatient; outpatient care; outpatient clinic
arrival; coming; advent
invasion; raid; attack; visitation (of a calamity)
afterlife; the next world; the world beyond
from ancient times; since olden days; from time immemorial
pre-existing; conventional; existing
visitor; caller; guest
visit; call
return; coming back; revisit · second coming; second advent; reincarnation
coming and going; traffic · road; street · socializing; mutual visits; association · recurring (thoughts, etc.) · correspondence
originally; by nature; essentially · in the first place; to begin with
next season; next year
traditional; conventional; long-standing
coming flying in; arriving by air (birds, sand, etc.) · coming by airplane; arriving by air (person)
long-standing; long-cherished; of many years · for years; over the years; for a long time
retainer; vassal; follower
visit a facility; come to a venue
next fiscal year; next year