sageo 下緒 ( さげお ) - sword knot; cord used to secure a katana in the belt

saisaku 細作 ( さいさく ) - another term for ninja

sakki 殺気 ( さっき ) - intent to kill

samegawa 鮫皮 ( さめがわ ) - shark or ray skin wrapped around the handle of a sword

samurai 侍 ( さむらい ) - samurai

sanshakubou 三尺棒 ( さんしゃくぼう ) - 3 shaku stick; hanbou

sasumata 刺股 ( さすまた ) - pole weapon used to control or capture people at a distance; "spear fork"

satsujinken 殺人剣 ( さつじんけん ) - life-taking sword

seiryoku zenyou 勢力善用 ( せいりょくぜにょう ) - efficient use of energy

seiza 正座 ( せいざ ) - kneeling seated posture; "seated correctly"

sen 先 ( せん ) - initiative; the decisive moment when a killing action is initiated;

sen no sen 先の先 ( せんのせん ) - Strike as opponent commits to an attack but before he moves

senban 銛盤 ( せんばん ) - type of flat shuriken used in Togakure ryuu ninjutsu

sendan maki 千段巻 ( せんだんまき ) - the rattan or hemp wrapping around the insertion point of the blade of a yari or naginata which is then coated with lacquer

sengoku jidai 戦国時代 ( せんごくじだい ) - Age of Warring States; a period in Japanese history of near-constant civil war, social upheaval, and political intrigue from 1467 to 1615

senjou kumiuchi 戦場組討 ( せんじょうくみうち ) - battlefield grappling

senjutsu 戦術 ( せんじゅつ ) - battlefield tactics

senryaku 戦略 ( せんりゃく ) - strategy

seppa 切羽 ( せっぱ ) - spacers placed between the tsuba and handle of a sword

shakoken 蝦蛄拳 ( しゃこけん ) - open handed palm strike

shaku 尺 ( しゃく ) - measure of length; about 11.93 inches

shakujou 錫杖 ( しゃくじょう ) - walking stick carried by travelling monks typically tipped with an encircled metal finial with a number of interlocking rings

shikanken 指環拳 ( しかんけん ) - strike with the second knuckles of the hand (Togakure ryuu)

shikin haramitsu daikomyou 詞韻波羅蜜大光明 ( しきんはらみつだいこみょう ) - words spoken at the beginning of Bujinkan classes

shikomizue 仕込杖 ( しこみずえ ) - cane sword; short staff with blade hidden inside

shime 締め ( しめ ) - choke

shimewaza 締め技 ( しめわざ ) - choking technique

shinken 真剣 ( しんけん ) - real sword; live blade

shinken shoubu 真剣勝負 ( しんけんしょうぶ ) - a fight or duel with real swords

shinobi 忍び ( しのび ) - term referring to person who practices ninjutsu

shinobi 志能備 ( しのび ) - early term for ninja

shinobi 竊盗 ( しのび ) - another term for ninja

shinobi no jutsu 忍の術 ( しのびのじゅつ ) - methods of stealth; ninjutsu

shinobi no mono 忍の者 ( しのびのもの ) - person who practices ninjutsu

shinobi no mono 忍ノ者 ( しのびのもの ) - person who practices ninjutsu

shinobi shouzoku 忍び装束 ( しのびしょうぞく ) - ninja clothes; black clothing associated with the ninja

shinobizue 忍び杖 ( しのびずえ ) - cane with hollowed out interior to conceal weapons

shinogi 鎬 ( しのぎ ) - ridge that runs down the midsection of the blade of a Japanese sword

shinogiji 鎬地 ( しのぎじ ) - the area between the shinogi and the mune on a Japanese sword

shinshinkanpajutsu 身心看破術 ( しんしんかんぱじゅつ ) - the ability to read the opponent by touching them

shishinken 指針拳 ( ししんけん ) - strike with the little finger of the hand

shitanken ( ) - finger tip strike

shitouken 指刀拳 ( しとうけん ) - thumb tip strike; boushiken

shousei ( ) - victorious voice; a kind of kiai

shubaku 手白 ( しゅばく ) - unarmed close combat techniques

shudendou 修験道 ( しゅげんどう ) - a highly syncretic Buddhic religion or sect and mystical-spiritual tradition which originated in pre-Feudal Japan

shugenja 修験者 ( しゅげんじゃ ) - a practitioner of shugendou

shugyou 修行 ( しゅぎょう ) - training; practice; discipline; study; ascetic practices

shugyousha 修行者 ( しゅぎょうしゃ ) - practitioner of martial arts; practitioner of austerities

shukou 手鉤 ( しゅこう ) - hand claws used to aid in climbing; formerly a secret tool of Togakure ryuu ninjutsu; tekagi

shuriken 手裏剣 ( しゅりけん ) - throwing spikes or plates

shurikendome 手裏剣止 ( しゅりけんどめ ) - stopping or avoiding thrown weapons

shutouken 手刀拳 ( しゅとうけん ) - strike with the pinky-side of the hand

sode 褎 ( そで ) - sleeve

sode 袖 ( そで ) - sleeve; armored shoulder upper arm protection

sodegarami 袖搦 ( そでがらみ ) - pole weapon used to control or capture people at a distance; "sleeve entangler"

sokkou 足甲 ( そっこう ) - metal claws worn on the feet to aid in climbing (Togakure ryuu)

sokugyakuken 足逆拳 ( そくぎゃくけん ) - kick to strike with the toes

sokuyakuken 足躍拳 ( そくやくけん ) - strike using the heel of the foot

sonkyo 蹲踞 ( そんきょ ) - crouching posture

soudensho 相伝書 ( そうでんしょ ) - record of inheritance

souhei 僧兵 ( そうへい ) - warrior monks

soujutsu 槍術 ( そうじゅつ ) - techniques of the spear

souke 宗家 ( そうけ ) - grandmaster, head of ryuu

sousho 草書 ( そうしょ ) - cursive style of writing

suhada bujutsu 素肌武術 ( すはだぶじゅつ ) - martial techniques done in street clothes

suhada kumiuchi 素肌組討 ( すはだくみうち ) - fighting without armor

suijutsu 水術 ( すいじゅつ ) - swimming skills

suiren 水練 ( すいれん ) - swimming practice; swimming skills

sujikabuto 筋子兜 ( すじかぶと ) - armored helmet;

suki 隙 ( すき ) - opening; weak point

sukima 隙間 ( すきま ) - an opening or gap (in kamae)

sukima 透き間 ( すきま ) - an opening or gap (in kamae)

sun 寸 ( すん ) - measure of length; about 1.19 inches; 10 sun = 1 shaku

suneate 脛当て ( すねあて ) - armored shin guards

suneate 臑当 ( すねあて ) - armored shin guards

suppa 素破 ( すっぱ ) - another term for ninja; small team of ninja

suppa 水破 ( すっぱ ) - another term for ninja

suppa 出抜 ( すっぱ ) - another term for ninja

suppa 透破 ( すっぱ ) - another term for ninja

sutemi 捨身 ( すてみ ) - sacrifice technique