| King Naemul 내물 이사금 奈勿尼師今 | |
| Isageum Maripgan | |
| Succession: | Ruler of Silla |
| Reign: | 356-402 |
| Coronation: | 356 |
| Predecessor: | Heulhae of Silla |
| Successor: | Silseong of Silla |
| Father: | Kim Mal-gu |
| Mother: | Queen Hyulye |
| Birth Date: | ??? |
| Death Date: | 402 |
| Death Place: | Silla |
| Posthumous Name: | King Naemul (내물 이사금, 奈勿尼師今) |
| Hangul: | 내물 이사금 or 내물 마립간 |
| Hanja: | 奈勿尼師今 or 奈勿麻立干 |
| Rr: | Naemul Isageum or Naemul Maripgan |
| Mr: | Naemul Isagŭm or Naemul Maripkan |
Naemul of Silla (died 402) (r. 356–402) was the 17th ruler of the Korean kingdom of Silla. He was the nephew of King Michu. He married Michu's daughter, Lady Boban. He is given the title Isageum, the same one borne by earlier rulers, in the Samguk Sagi; he is given the title Maripgan, borne by later rulers, in the Samguk Yusa. He is the first to bear the title Maripgan in any record. The name can be read Namul or Namil (那密).
He is also the first king to appear by name in Chinese records. It appears that there was a great influx of Chinese culture into Silla in his period, and that the widespread use of Chinese characters began in his time. Naemul sent a tribute mission to the king of Early Jin in 381. This envoy, Widu (衛頭) visited Early Jin with the help of Goguryeo. In response to a question by Fu Jian, Widu stated that the name of country had changed (to Silla).
In this tribute, Goguryeo represents Silla as a subordinate to Goguryeo. However, Silla acknowledges this because Goguryeo is needed to guard against Gaya-Japan Alliance.
Naemul's later reign was troubled by recurrent invasions by Wa Japan and the northern Malgal tribes. This began with a massive Japanese incursion in 364, which was repulsed with great loss of life.
His reign overlaps with Geunchogo of Baekje and Gwanggaeto the Great.[2]