opposite side;  bottom;  rear;  back;  lining;  inside;  in the shadows
 to betray;  to turn traitor to;  to double-cross
 opposite;  reverse;  contrary
 the reverse;  other side;  lining
 treachery;  betrayal;  perfidy
 betrayer;  traitor;  turncoat;  informer
 backdoor;  rear entrance;  rear exit;  unauthorized;  illicit;  illegal
 back (esp. of a building, etc.);  rear;  behind
 back street;  back alley;  off-street
 to cross one's mind;  to occur to one
 behind closed doors;  behind-the-scenes;  (under the veil of) secrecy
 to have a catch;  to have an ulterior motive;  to be more (to something)
 to be turned inside out;  to betray;  to double-cross;  to break into falsetto;  to crack into falsetto
 to turn inside out;  to turn the other way;  to turn (something) over
 to support (a theory, claim, etc.);  to back up;  to substantiate;  to prove
 to cross one's mind;  to occur to one;  to flash into one's head
 someone working behind-the-scenes;  scene shifter;  lady consort (to a high personage)
 inside out;  upside down;  flip side;  opposite;  contrary
 back and front;  inside and outside;  inside out (e.g. clothing);  double-dealing;  two faces (cf. two-faced);  outward appearance and actual condition
 to backfire;  to produce a result opposite to what was expected or intended
 side street (often parallel to a main street);  back street;  alley;  alleyway
 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
 support (e.g. for an argument);  backing;  proof;  evidence;  corroboration;  substantiation
 back (side);  reverse;  other side;  inside;  background;  dark side (e.g. of society)
 back lane;  byway;  back street;  unfair means;  dishonest means
 mountain (or hill) behind a house, village, etc.;  side of a mountain that gets little sunshine;  envious;  jealous
 secret trick;  hidden method;  trick of the trade;  cheat (in a video game)
 shuriken;  small throwing blade;  throwing star
 underworld;  underside of society
 to crack (person's voice);  to squeak
 lining;  backing;  backing up (e.g. a theory);  support;  bolstering
 urasuji;  side fork;  frenulum;  frenulum of prepuce of penis
 offstage;  backstage;  behind the scenes
 to cross one's mind;  to occur to one;  to flash into one's head
 backhand blow;  backhand chop;  backfist (karate)
 front and back;  inside and outside;  two sides;  duplicity;  double-dealing;  being two-faced
 to arrange beforehand to tell the same story;  to get the stories straight
 the two views (of an object) referring to the same thing;  being inseparable like the two sides of an object;  two sides of the same coin
 sunken hearth;  sunken fireplace
 betrayer;  traitor;  turncoat;  informer
 bribe;  secret fund;  slush fund;  money for bribery
 lining;  land that does not adjoin to public or private roads
 act of treachery;  breach of faith;  stab in the back;  double-cross
 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)
 inside story;  the real story (behind something);  story not generally known
 arranging beforehand to tell the same story;  getting the stories straight;  coordinating one's stories
 support (e.g. for an argument);  backing;  proof;  evidence;  corroboration;  substantiation
 in (e.g. secret);  with (e.g. success)
 back street;  back alley;  slums
 imperial palace;  festival dolls representing the emperor and the empress
 secret accounts;  unauthorized accounting;  under-the-counter accounting
 endorsement;  proof;  note on back of the scroll
 illegal channel;  back channel;  black market
 urasuji;  side fork;  frenulum;  frenulum of prepuce of penis
 gathering evidence (e.g. to back a news story);  getting the facts;  obtaining supporting evidence
 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
 to outwit;  to outsmart;  to counterplot;  to pierce something all the way through
 actual and hidden;  inside out (e.g. socks);  face down (e.g. cards)
 endorsement;  proof;  note on back of the scroll
 secret menu;  secret menu item
 underground website (often critical or containing unofficial information)
 Imperial Palace;  Imperial Court
 secret intelligence;  underground information;  confidential information;  inside information
 backdoor admission to a school;  backdoor entry to a school;  buying one's way into school;  bribing one's way into a school
 temple kitchen;  monastery kitchen;  quarters of a head priest (and his family)
 house in an alley;  rear tenement
 dressing room;  green room;  backstage;  inside story;  confidential talk;  hidden circumstances
 back street;  back alley;  slums
 one's heart;  one's mind (feelings, bosom)
 back cover (e.g. camera, watch, etc.)
 (with a) successful outcome;  (ending in) success
 unlicensed gambling establishment
 arena (e.g. international arena)
 black market adult video;  black market adult film;  bootleg video
 secret leader of a group of juvenile delinquents;  program in a competing timeslot (programme)
 anonymous account (on social media; used alongside one's main account);  secret account
 Japan Sea coastal areas;  Sea of Japan coastal areas
 search for corroborative evidence
 the reverse;  other side;  lining
 if it sounds too good to be true, it probably is;  there's a flip side to every coin
 backing paper;  back paper;  backing sheet;  paper printed or used on one side;  reverse side of paper printed on one side
 imperial palace;  person living in the imperial palace (esp. the emperor);  festival dolls representing the emperor and the empress
 underground website or online message board for a school where students typically exchange information on tests, commit cyberbullying, etc.
 one's mind;  the bottom of one's heart;  inner feelings
 greater palace;  area centered on the inner palace, home to various administrative bodies
 festival dolls representing the emperor and the empress
 program competing with another in the same timeslot (programme);  counterprogram (television)
 unlucky quarter (southwest)
 back of one's eyes (in which an image or landscape has been metaphorically etched)
 Gleichenia japonica (species of fern with white-backed leaves);  white underside;  white bottom;  white inner
 Urasenke school of tea ceremony
 roof boards;  ceiling;  back board (furniture)
 anonymous account (on social media; used alongside one's main account);  secret account
 side street (often parallel to a main street);  back street;  alley;  alleyway
 hidden dora tile available when a player wins by riichi
 the reverse;  other side;  lining
 secretly;  covertly;  tacitly
 imperial palace temporarily built outside of the great imperial palace (Heian period)
 ura-nage (in judo, an over-the-head throw performed by rolling backwards)
 second crop;  interim crop
 to pierce something all the way through (with a lance, arrow, etc.)
 lining of a sleeve;  sleeve lining
 hidden historical background
 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
 if it sounds too good to be true, it probably is;  there's a flip side to every coin
 string-pulling;  backstage manoeuvering (maneuvering)
 to make a mistake (e.g. in choosing one's melds)
 suede;  leather using the underside of the skin;  piece of leather on the underside of a bag, purse, etc.
 purl (stitch);  purl knitting
 sail with the wind at its back;  aback
 lining at the bottom of a kimono
 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
 behind one's home;  one's backyard
 alley house;  rear tenement;  slum
 festival dolls representing the emperor and the empress
 Ura-Hara fashion;  fashion style associated with a section of the Harajuku neighbourhood of Tokyo
 there are wheels within wheels;  there's more than meets the eye
 (skillfully) giving other participants in a variety TV show the chance to talk by asking them questions or calling them out
 underside of a bird's wing;  lining of a haori
 background recording;  recording a different TV program than one is watching
 fitting things back to back;  agreement of minds
 Urasenke school of tea ceremony
 back cover (e.g. camera, watch, etc.)
 lined (clothing, etc.);  something lined
 social circles;  arena of (fashionable) society
 to ascertain a person's innermost feelings
 lined (clothing, etc.);  something lined
 if it sounds too good to be true, it probably is;  there's a flip side to every coin
 bad year (for fruit);  off year;  low pollen year
 to be turned inside out;  to betray;  to double-cross;  to break into falsetto;  to crack into falsetto
 support (e.g. for an argument);  backing;  proof;  evidence;  corroboration;  substantiation
 sunken hearth;  sunken fireplace
 secretly;  covertly;  tacitly
 if it sounds too good to be true, it probably is;  there's a flip side to every coin
 scoring combination consisting of the January, February and March 5-point cards
 being jealous of somebody over something but also thinking they should be sentenced to death over it (esp. of male teachers having sexual relations with their students)
 there are wheels within wheels;  there's more than meets the eye
 Sorbus matsumurana (species of rowan)
 lining a kimono with the same material as the kimono itself
 end leaves (of a book);  lining paper
 malus tschonoskii;  white angel
 continued overleaf;  please turn over;  PTO
 inside the back cover (book);  rear end-paper
 bleached lining (esp. tabi);  bleached interior
 bleached lining (esp. tabi);  bleached interior
 bleached lining (esp. tabi);  bleached interior
 lingual braces (dentistry)
 makizushi with the rice on the outside
 note written on the reverse of the right side of an ancient document (memorandum or explanation of the contents)
 even Homer nods; (lit.) even a polished mirror conceals its reverse side
 to look at it from another perspective;  to look at it from a different angle;  to put it the other way round
 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
 last day of the Bon festival (July 20 in most parts of Japan)
 all girls eventually awaken to sex; (lit.) even the seed growing in the shade will burst open
 pointless (academic) degree;  meaningless qualification;  useless license; (lit.) a grain of rice on the sole of the foot (must be removed, but not enough for a meal)
 scoring combination consisting of the January, February and March 5-point cards
 Astralium haematragum (species of turban shell)
 Japanese mountain ash (Sorbus japonica);  Japanese whitebeam