kii

• Kii House, a branch family of the Tokugawa clan that ruled Japan during the Edo period
• Yūshi Naishinnō-ke no Kii, or Lady Kii of Princess Yūshi's Household, a poet and noblewoman in the Heian period

• Kii Corporation, a mobile cloud services company (MBaaS)

• Kii Channel, a strait separating Honshū and Shikoku islands of Japan.
• Kii Mountains, a mountain range in the Kansai region of Japan.
• Kii Province, a former province of Japan.
• Kii Peninsula, a peninsula in the Kansai region of Japan.
• Kii Ōshima, an island off Shiono Point, the tip of the Kii Peninsula

• Kii Station, a train station in Wakayama, Wakayama Prefecture, Japan
• Kii-Arita Station, a train station in Kushimoto, Higashimuro District, Wakayama Prefecture, Japan
• Kii-Gobō Station, a train station in Gobō, Wakayama Prefecture, Japan
• Kii-Hiki Station, a train station in Shirahama, Nishimuro District, Wakayama Prefecture, Japan
• Kii-Hime Station, a train station in Kushimoto, Higashimuro District, Wakayama Prefecture, Japan
• Kii-Hosokawa Station, a train station in Kōya, Ito District, Wakayama Prefecture, Japan
• Kii-Ichigi Station, a train station in Mihama, Minamimuro District, Mie Prefecture, Japan
• Kii-Ida Station, a train station in Kihō, Minamimuro District, Mie Prefecture, Japan
• Kii-Ida Station, a train station in Kihō, Minamimuro District, Mie Prefecture, Japan
• Kii-Kamiya Station, a train station in Kōya, Ito District, Wakayama Prefecture, Japan
• Kii-Katsuura Station, a train station in Nachikatsuura, Higashimuro District, Wakayama Prefecture
• Kii-Miyahara Station, a train station in Arida, Wakayama Prefecture, Japan
• Kii-Nagashima Station, a train station in Kihoku, Kitamuro District, Mie Prefecture, Japan
• Kii-Nakanoshima Station, a train station in Wakayama, Wakayama Prefecture, Japan
• Kii-Ogura Station, a train station in Wakayama, Wakayama Prefecture, Japan
• Kii-Sano Station, a train station in Shingū, Wakayama Prefecture, Japan
• Kii-Shimizu Station, a train station in Hashimoto, Wakayama Prefecture, Japan
• Kii-Shinjō Station, a train station in Tanabe, Wakayama Prefecture, Japan
• Kii-Tahara Station, a train station in Kushimoto, Higashimuro District, Wakayama Prefecture, Japan
• Kii-Tanabe Station, a train station in Tanabe, Wakayama Prefecture, Japan
• Kii-Temma Station, a train station in Nachikatsuura, Higashimuro District, Wakayama Prefecture, Japan
• Kii-Tonda Station, a train station in Shirahama, Nishimuro District, Wakayama Prefecture, Japan
• Kii-Uchihara Station, a train station in Hidaka, Hidaka District, Wakayama Prefecture, Japan
• Kii-Uragami Station, a train station in Nachikatsuura, Higashimuro District, Wakayama Prefecture, Japan
• Kii-Yamada Station, a train station in Hashimoto, Wakayama Prefecture, Japan
• Kii-Yura Station, a train station in Yura, Hidaka District, Wakayama Prefecture, Japan

• Ki'i, a Hawaiian deity
• {{sclass|Kii|battleship|1}}, a proposed class of Japanese battleships
• Kii Channel HVDC system, a submarine cable high voltage direct current transmission system
• Kii Kitano, a Japanese gravure idol and actress
• Kii Hunter—see Key Hunter (a former prime-time television detective series in Japan)

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