Answer:

1. Biwa, Japanese short-necked lute, distinguished by its graceful, pear-shaped body. The biwa has a shallow, rounded back and silk strings (usually four or five) attached to slender lateral pegs. The instrument is played with a large wedge-shaped plectrum called a bachi. The strings are tuned in fourths, and the melody is played almost exclusively on the highest pitched string.
2. Taiko, any of various Japanese forms of barrel-shaped drums with lashed or tacked heads, usually played with sticks (bachi). When the word combines with another for the name of a specific type of drum, the t euphonically changes to d, thus o-daiko for the large two-headed tacked drum heard in folk festivals, Buddhist temples, and off-stage in Kabuki theatre. The two-headed taiko set off the floor by a rack and used in Noh and Kabuki drama is a shime-daiko because it is lashed (shimeru). It uses a small patch of deerskin in the centre of the head to soften its tone. Festival taiko have a black dot painted in the same spot, but their thicker heads are played with thinner sticks and produce a livelier, “outdoor” sound. Traditionally they are lashed with heavier rope, though some modern instruments are tightened with large screws. The two-headed tacked drum hung in an elaborate circular frame in court music is a gaku-daiko or tsuri-daiko.
3. Koto, also called kin, long Japanese board zither having 13 silk strings and movable bridges. The body of the instrument is made of paulownia wood and is about 190 cm (74 inches) long. When the performer is kneeling or seated on the floor, the koto is held off the floor by two legs or a bridge-storage box; in most modern concerts, the instrument is placed on a stand so the performer can sit on a chair. The koto is played by plucking the strings with the thumb and first two fingers of the right hand, which are fitted with ivory plectrums called tsume. The left hand, in traditions after the 16th century, may alter the pitch or sound of each string by pressing or manipulating the strings to the left of the bridges. Various pentatonic tunings are used, depending on the type of music being played.
4. Shakuhachi, a Japanese end-blown bamboo flute that was originally derived from the Chinese xiao in the 8th century. The shakuhachi’s blowing end is cut obliquely outward, and a small piece of ivory or bone is inserted at the edge so that subtle varieties of tone colour can be produced. The bell (flared end) consists of the trunk of the bamboo plant with its root ends. The body is naturally or artificially bent above the bell for aesthetic reasons.
5. samisen, also spelled shamisen, long-necked fretless Japanese lute. The instrument has a small square body with a catskin front and back, three twisted-silk strings, and a curved-back pegbox with side pegs. It is played with a large plectrum; different types of plectrums produce distinct tone colours for specific types of music.

Explanation:

Is it Daiko or Taiko??