The sediment samples for radiolarian analysis (76 samples) were taken in the upper part of core LV76- 18-1, recovered from the Tenji Seamout at depth of 2863m (Northwestern Pacific). We observed 301 radiolarian taxa in the samples: 128 taxa from 56 genera of Spumellaria, 165 taxa from 66 genera of Nassellaria, and 8 taxa from 2 genera of Collodaria. Records of total radiolarian abundance and its accumulation rates (fluxes) over the 88 kyr are presented. Here we also used earlier published age model of studied core, data of δ¹⁸O of planktic foraminifera and δ¹⁸O of benthic foraminifera, lithological (IRD) and productivity proxies (Ba-bio, CaCO₃ and total organic content) of sediments from the Okhotsk Sea and NW Pacific cores. Records of the total radiolarian abundance and its fluxes) clearly demonstrate millennium scale changes over the last 88 kyr. On order to understand reasons behind them, we reconstruct temporal variability of the North Pacific Intermediate Water at millennium scale in the past by comparison of the δ¹⁸O of benthic foraminifera Uvigerina spp. of earlier published cores from the Sea of Okhotsk and northwestern Pacific (δ¹⁸OUv) with benthic LS16 stack. Larger deviation of the δ¹⁸OUv these cores from benthic LS16 stack indicate increased formation of the North Pacific Intermediate Water, which bring into water column the water with lower δ¹⁸O values from surface. Comparison of the total radiolarian abundance and its accumulation rates with constructed variability of the North Pacific Intermediate Water demonstrate decreases of the radiolarian abundance and accumulation rates with enhancement of North Pacific Intermediate Water, which bring into water column the water with depleted nutrient concentration from surface. Mostly, these periods with decreased of the radiolarian abundance and accumulation rates/ enhancement of North Pacific Intermediate had occurred coeval with the Heinrich Stadials. Abrupt increases of radiolarian abundance and its accumulation rates, following after its drop during the North Pacific Intermediate Water intensification, mainly occurred during long-lasted Dansgaard-Oeschger Interstadials.