one person;  being alone;  being by oneself;  being single;  being unmarried;  by oneself
 number one;  first;  best;  most;  game;  round
 once;  one time;  temporarily;  for a moment;  one degree;  one tone
 more or less;  though not quite satisfactorily;  tentatively;  for the time being;  just in case;  once
 first;  foremost;  most important;  best;  greatest;  above all
 one part;  one portion;  one section;  one copy (e.g. of a document)
 single word;  a few words;  brief comment
 one day;  all day (long);  throughout the day;  first day of the month
 all present;  all concerned;  all of us
 one thin flat object;  one sheet
 family;  relatives;  dependents;  household
 one o'clock;  once;  at one time;  for a time;  for a while;  a time
 (if) by some chance;  by some possibility;  in the unlikely event that;  (unlikely event of) emergency;  the worst(-case scenario)
 fixed;  settled;  constant;  definite;  uniform;  regularized
 one face;  one surface;  the whole surface;  one aspect;  one side;  (on) the other hand;  one broad, flat object
 annual (plant);  first-year student
 one night;  all night;  overnight;  one evening
 first-class;  top grade;  characteristic;  peculiar;  school (e.g. of a performance art);  one flag
 more;  much more;  step;  rung;  paragraph;  passage
 eleven;  11;  jack (playing card);  Hodgson's hawk-cuckoo (Cuculus fugax);  Horsfield's hawk cuckoo
 one tenth;  one hundredth;  one percent;  one tenth of a sun;  one quarter ryō (an old coin)
 series;  chain;  two reams (i.e. 1000 sheets of paper);  verse;  stanza
 body;  group;  party;  gang;  troupe;  troop
 (unlikely event of) emergency;  the worst(-case scenario); (lit.) 10000 to 1;  (if) by some chance;  by some possibility;  in the unlikely event that
 (unlikely event of) emergency;  the worst(-case scenario); (lit.) 10000 to 1;  (if) by some chance;  by some possibility;  in the unlikely event that
 a line;  a streak;  one item (in an itemized form);  one clause;  one matter (affair, event, case, incident); (arch.)  the same logic
 the first and second;  a few
 one class;  one set;  a pair;  a suite;  a series
 one portion;  one serving;  adult;  grown-up;  fully fledged;  established
 first place;  first rank;  unit's position;  Japanese yew (Taxus cuspidata)
 uniform;  equal;  even;  common;  ordinary;  usual
 reaching a stopping place;  settling down (before the next stage);  getting to a point where one can rest;  one paragraph
 (a) principle;  (a) reason;  (a) point;  some truth
 from the beginning;  from scratch
 the whole company;  the party;  attendance (at a gathering);  presence;  banquet;  dinner;  troupe
 one person;  another name;  nickname;  alias
 one large ...;  a great ...
 important matter;  matter of great importance;  serious affair;  major incident;  emergency
 tiny amount of money;  a penny;  one letter;  one character;  one mon (unit of currency)
 one leaf;  one page;  one sheet; (arch.)  one boat
 one revolution;  one rotation
 one part;  one portion;  one section
 one-by-one;  separately;  every single;  each and every;  without omission
 family;  clan;  sect;  school;  group of related sumo stables
 Japan's best;  number one in Japan
 Japan's best;  number one in Japan
 entrusting (everything to);  leaving (a matter) entirely with
 one flower;  one wheel; (arch.)  full moon
 plot;  ulterior motive;  thing;  article;  penis
 generation;  lifetime;  age
 100,000,000;  one hundred million
 one army;  whole army;  first string players;  the cool kids;  the popular kids
 one Nth part (e.g. one fifth, one tenth);  one out of N
 unconditionally;  as a rule
 group;  flock;  crowd;  wide expanse (of flowers)
 top recommendation;  (something) highly recommended
 (not even) an inch;  (not even) a little bit; (lit.) one millimeter
 round-up (e.g. of criminals);  wholesale arrest;  catching the whole herd with one throw
 one cause;  one reason;  one factor
 first;  preliminary;  primary (sources, industry, etc.);  original;  linear (function, equation);  first-order
 first thing in the morning
 one yen;  throughout (an area);  whole district
 determined purpose;  an incredibly short span of time (i.e. the time occupied by a single thought);  a single repetition of a prayer (esp. in Jodo-shu)
 private person;  individual
 (one) letter;  (one) character
 one's every action;  every single move
 180.39 millilitres;  180.39 milliliters;  0.3306 square metres;  0.3306 square meters;  one-tenth of the way (from the foot of a mountain to the top)
 one meal;  one meal (a day)
 first year of high school;  first-year high school student
 first year of junior high school;  first-year junior high school student
 a help;  an aid;  some assistance
 first base;  first baseman;  one fort
 one vehicle;  one ryō (an old coin)
 one lump;  one body;  one group
 first person (to do);  person going first;  first place;  top position;  person in the top position
 ekayana (doctrine that only one teaching, usu. the Lotus Sutra, can lead to enlightenment)
 look;  glance;  stone (in the game of go)
 one direction;  unidirectional;  non-interactive
 clan;  partisans;  participation (e.g. in a plot);  one flavour;  one charm;  one ingredient (in traditional Chinese medicine)
 not quite (right);  not very good;  somewhat (lacking)
 one building (hall, temple, shrine, room);  same room;  same place;  same building
 one eye;  single lens (e.g. camera)
 one's whole life;  one's lifetime
 unique thing;  best on earth
 uniform;  even;  across-the-board;  equal
 (at a rate of) once a month;  10 percent monthly interest
 first period (e.g. first class in school day)
 one meaning;  one thought;  wholeheartedly;  single-mindedly;  unique
 one difficulty;  one danger
 first thing in the afternoon
 same kind;  accomplices;  companions
 one daughter;  eldest daughter;  first-born daughter
 dealt hand consisting of one 20-point card and six 1-point cards;  outstanding;  standing out above the rest
 (wearing only) a pair of underpants
 ordinary soldier;  mere soldier
 first year of elementary school;  first year elementary school student
 one wing;  (a) role;  (a) part
 (a) vein;  (a) thread (of connection)
 doing a good deed each day;  doing one good turn a day
 identical (of twins);  monozygotic;  unioval;  uniovular
 at the same time;  at a time;  at one time;  simultaneously
 one meaning;  primary importance;  primary significance;  a reason;  a truth
 one tablet;  one pill;  tray;  salver
 bowl (of rice);  pair (of chopsticks)
 (possession of) one feudal domain and one castle;  being independent (acting without compromise or assistance);  establishing only one castle in each feudal domain (edict issued by the shogunate in 1615)
 seventh day after a person's death;  first seven-day period after a person's death; (arch.)  seven days; (arch.)  one week
 wholehearted;  earnest;  determined;  intent;  single-minded;  straightforward
 failing college entrance exams and retaking them a year later
 person to be reckoned with;  person of importance;  one person;  one character;  someone
 one field;  a division;  a branch (e.g. of study, etc.)
 (a) branch (of flowers);  (a) cluster;  (a) mass (of clouds)
 exclusively;  (taking) best care
 unparalleled in Japan and China and India
 by any chance;  ten thousand to one
 by any chance;  ten thousand to one
 main party (of the night);  first party
 conjugation (inflection, declension) of ichidan verbs ending in "iru"
 conjugation (inflection, declension) of ichidan verbs ending in "eru"
 (not even) a bit of;  (not even) a hint of;  (not) an iota of
 full particulars;  the whole story;  from beginning to end
 word (opinion, objection)
 number one in all of America;  best in all of America
 the one absolute truth;  the one reality
 Ten'ichijin;  Nakagami;  god of fortune in Onmyōdō who descends to the northeast on the 46th day of the sexagenary cycle and completes a clockwise circuit, spending five days on each cardinal point and six days on each ordinal point, returning to heaven from the north on the 30th day of the next sexagenary cycle; travelling in the direction of Ten'ichijin is considered unlucky
 top recommendation;  (something) highly recommended
 return of spring;  long-awaited, favorable turn of fortune (favourable)
 first torii gate of a shrine
 a sentence;  one sentence;  (short) piece of writing
 Unit 731 (biological warfare unit of the Japanese Imperial Army)
 dealt hand consisting of one 20-point card and six 1-point cards;  outstanding;  standing out above the rest
 one matter;  one case;  physical intimacy;  sexual intercourse
 (excelling in) one area or skill;  (being skilled or gifted in) one certain area
 top-ranked firm;  top-tier corporation;  leading company;  prestigious company;  stellar company
 depends entirely on;  depends above all on
 page in the history books;  historical (event);  old news
 combining the working parts of two or more broken machines to make one functioning machine;  manufacturing one part out of multiple different parts
 ichibukin;  Edo-period rectangular gold coin worth a quarter ryō
 first and foremost;  most important thing to do first;  top priority; (lit.) plot 1, block 1
 Very sincerely yours; (arch.)  different
 advantages and disadvantages;  gain some, lose some
 single-stringed Japanese zither
 (being separated only by a) narrow strip of water;  narrow strait (channel, river)
 type of illegal loan charging 10% interest every 10 days;  dealt hand consisting of 1-point cards and one single 10-point card
 type of illegal loan charging 10% interest every 10 days;  dealt hand consisting of 1-point cards and one single 10-point card
 first-grade tea (first picking)
 closest pine-tree to a noh stage (of the three placed in front of the bridge walkway)
 general incorporated foundation
 first anniversary of a person's death
 first visit to inn, restaurant, etc. without an introduction
 type 1 diabetes;  juvenile diabetes
 single-stringed Japanese zither
 flushness (esp. of wheels and fenders on an automobile);  tsuraichi
(arch.)  first-born imperial prince;  most important provincial shrine
 unicameral system;  unicameralism
 one who experiences a chronic ailment takes better care of his health and lives longer
 single nucleotide polymorphism;  SNP
 sink or swim;  all or nothing;  hit or miss;  make or break
 one summer (during which a monk attends a summer retreat)
 an office;  an important office
 A single seed can eventually produce a great harvest;  Even the smallest beginning can generate a greatest profit;  Watch the pennies, and the pounds will look after themselves
 children's game in which two groups compete for members by playing janken
 innovation;  new vista;  new field
 first string (of a shamisen, etc.)
 First Epistle to the Corinthians (book of the Bible)
 First Epistle to the Thessalonians (book of the Bible)
 by any chance;  ten thousand to one
 by any chance;  ten thousand to one
 ichibugin;  Edo-period rectangular silver coin worth one quarter ryō
 one-part;  single-part;  single-component
 First Epistle to Timothy (book of the Bible)
 First Epistle of Peter (book of the Bible)
 First Epistle of John (book of the Bible)
 September 11 attacks;  9/11
 16,800,000-year period over which a human lifespan increases from ten years to 84,000 years (by one year per century) and then decreases back to ten (by one year per century)
 dealt hand consisting of one 5-point card and six 1-point cards
 adenosine monophosphate (AMP)
 kanji "bare bone" radical at left
 kanji "big shell" radical
 first day of the cock in the eleventh month
 single charge (esp. in electric vehicles)
 adenosine monophosphate (AMP)
 self-contained (of a story)
 drop in the bucket;  drop in the ocean; (lit.) one grain of millet in a vast ocean
 drop in the bucket;  drop in the ocean; (lit.) one grain of millet in a vast ocean
 being once divorced;  one-time divorcee; (lit.) one x mark (i.e. one name struck from the family register)
 losing easily;  being trounced;  being beaten hands down
 being once divorced;  one-time divorcee; (lit.) one x mark (i.e. one name struck from the family register)
 digital single lens reflex camera;  digital SLR camera
 first-born imperial prince