opposite;  reverse;  contrary
 the reverse;  other side;  lining
 back (esp. of a building, etc.);  rear;  behind
 back street;  back alley;  off-street
 to have a catch;  to have an ulterior motive;  to be more (to something)
 to support (a theory, claim, etc.);  to back up;  to substantiate;  to prove
 someone working behind-the-scenes;  scene shifter;  lady consort (to a high personage)
 side street (often parallel to a main street);  back street;  alley;  alleyway
 side street (often parallel to a main street);  back street;  alley;  alleyway
 back and front;  inside and outside;  inside out (e.g. clothing);  double-dealing;  two faces (cf. two-faced);  outward appearance and actual condition
 mountain (or hill) behind a house, village, etc.;  side of a mountain that gets little sunshine;  envious;  jealous
 to outwit;  to outsmart;  to counterplot;  to pierce something all the way through
 to turn inside out;  to turn the other way;  to look at (something) from another perspective;  to put it the other way round;  to visit the same prostitute or geisha for a second time
 urasuji;  side fork;  frenulum;  frenulum of prepuce of penis
 back (side);  reverse;  other side;  inside;  background;  dark side (e.g. of society)
 underworld;  underside of society
 secret trick;  hidden method;  trick of the trade;  cheat (in a video game)
 support (e.g. for an argument);  backing;  proof;  evidence;  corroboration;  substantiation
 back lane;  byway;  back street;  unfair means;  dishonest means
 offstage;  backstage;  behind the scenes
 backhand blow;  backhand chop;  backfist (karate)
 front and back;  inside and outside;  two sides;  duplicity;  double-dealing;  being two-faced
 lining;  land that does not adjoin to public or private roads
 lining;  land that does not adjoin to public or private roads
 dodgy dealings;  monkey business
 to support (a theory, claim, etc.);  to back up;  to substantiate;  to prove
 reverse side;  opposite (of the expected);  purl stitch (knitting)
 back street;  back alley;  slums
 secret accounts;  unauthorized accounting;  under-the-counter accounting
 urasuji;  side fork;  frenulum;  frenulum of prepuce of penis
 support (e.g. for an argument);  backing;  proof;  evidence;  corroboration;  substantiation
 determining a speaker's true or hidden meaning;  determining a speaker's intentions from his manner of speech; (arch.)  divining good or bad luck from listening to someone
 gathering evidence (e.g. to back a news story);  getting the facts;  obtaining supporting evidence
 illegal channel;  back channel;  black market
 underground website (often critical or containing unofficial information)
 to outwit;  to outsmart;  to counterplot;  to pierce something all the way through
 secret menu;  secret menu item
 actual and hidden;  inside out (e.g. socks);  face down (e.g. cards)
 secret intelligence;  underground information;  confidential information;  inside information
 back street;  back alley;  slums
 anonymous account (on social media; used alongside one's main account);  secret account
 unlicensed gambling establishment
 secret leader of a group of juvenile delinquents;  program in a competing timeslot (programme)
 dressing room;  green room;  backstage;  inside story;  confidential talk;  hidden circumstances
 black market adult video;  black market adult film;  bootleg video
 Japan Sea coastal areas;  Sea of Japan coastal areas
 Japan Sea coastal areas;  Sea of Japan coastal areas
 the reverse;  other side;  lining
 unlucky quarter (southwest)
 program competing with another in the same timeslot (programme);  counterprogram (television)
 Urasenke school of tea ceremony
 fitting things back to back;  agreement of minds
 anonymous account (on social media; used alongside one's main account);  secret account
 roof boards;  ceiling;  back board (furniture)
 the reverse;  other side;  lining
 hidden dora tile available when a player wins by riichi
 second crop;  interim crop
 ura-nage (in judo, an over-the-head throw performed by rolling backwards)
 to pierce something all the way through (with a lance, arrow, etc.)
 lining of a sleeve;  sleeve lining
 offset (printing process);  show-through;  printing on one side of a sheet being visible from the other side
 suede;  leather using the underside of the skin;  piece of leather on the underside of a bag, purse, etc.
 act or trick which a performer reserves for selected occasions
 suede;  leather using the underside of the skin;  piece of leather on the underside of a bag, purse, etc.
 to make a mistake (e.g. in choosing one's melds)
 set-off;  offset;  unwanted transfer of ink from a freshly printed sheet to an adjacent sheet in a pile;  show-through;  printing on one side of a sheet being visible from the other side
 lining at the bottom of a kimono
 alley house;  rear tenement;  slum
 behind one's home;  one's backyard
 sail with the wind at its back;  aback
 underside of a bird's wing;  lining of a haori
 (skillfully) giving other participants in a variety TV show the chance to talk by asking them questions or calling them out
 Urasenke school of tea ceremony
 there are wheels within wheels;  there's more than meets the eye
 Ura-Hara fashion;  fashion style associated with a section of the Harajuku neighbourhood of Tokyo
 background recording;  recording a different TV program than one is watching
 back cover (e.g. camera, watch, etc.)
 lined (clothing, etc.);  something lined
 lined (clothing, etc.);  something lined
 support (e.g. for an argument);  backing;  proof;  evidence;  corroboration;  substantiation
 there are wheels within wheels;  there's more than meets the eye
 inside the back cover (book);  rear end-paper
 lining a kimono with the same material as the kimono itself
 bleached lining (esp. tabi);  bleached interior
 makizushi with the rice on the outside
 day-after festival;  night-after festival;  (smaller) festival held the day (or night) after the main festival
 day-after festival;  night-after festival;  (smaller) festival held the day (or night) after the main festival
 bleached lining (esp. tabi);  bleached interior
 bleached lining (esp. tabi);  bleached interior
 last day of the Bon festival (July 20 in most parts of Japan)
 scoring combination consisting of the January, February and March 5-point cards